Gr 11 Physical Sciences: June Medium
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Questions and Answers

What happens when like charges interact with each other?

  • They do not interact with each other
  • The interaction is dependent on the distance between them
  • They repel each other (correct)
  • They attract each other

What is the electrostatic force between two charges dependent on?

  • The gravitational constant and the distance between them
  • The magnitude of the charges and the distance between them (correct)
  • The velocity of the charges and the distance between them
  • The mass of the charges and the distance between them

What is the proportionality constant in Coulomb's law?

  • Electrostatic constant (correct)
  • Electromagnetic constant
  • Universal constant
  • Gravitational constant

What is the form of Coulomb's law similar to?

<p>Newton's universal law of gravitation (D)</p> Signup and view all the answers

What is the value of the electrostatic constant in free space?

<p>9.0 × 10^9 N·m^2/C^2 (B)</p> Signup and view all the answers

What is the relationship between the electrostatic force and the distance between the charges?

<p>The electrostatic force is inversely proportional to the square of the distance between the charges (D)</p> Signup and view all the answers

Who first studied the electrostatic force in detail?

<p>Charles-Augustin de Coulomb (B)</p> Signup and view all the answers

What is the form of the equation that represents the electrostatic force between two point-like charges?

<p>F = k Q_1 Q_2 / r^2 (C)</p> Signup and view all the answers

What is the direction of the electric field at a point in space?

<p>The direction in which a positive test charge would move if placed at that point (D)</p> Signup and view all the answers

What do electric field lines represent?

<p>The strength and direction of the electric field (B)</p> Signup and view all the answers

What is the mathematical relationship that describes the electrostatic force between two point charges?

<p>F = k \frac{Q_1 Q_2}{r^2} (C)</p> Signup and view all the answers

What is the force experienced by a positive test charge around a positive charge?

<p>Repulsive force (B)</p> Signup and view all the answers

What is the value of the electrostatic constant in free space?

<p>9.0 \times 10^9 , \text{N·m}^2/\text{C}^2 (B)</p> Signup and view all the answers

What is the direction of the force vectors around a negative charge?

<p>Pointing towards the negative charge (B)</p> Signup and view all the answers

What do electric field lines show around two unlike charges?

<p>The direction of the force that a positive test charge would experience (D)</p> Signup and view all the answers

What happens to the electrostatic force between two charges when the distance between them doubles?

<p>It decreases by a factor of four (C)</p> Signup and view all the answers

What happens to the electric field lines between two like charges of equal magnitude?

<p>They cancel out, resulting in no net force on a test charge (D)</p> Signup and view all the answers

What is the mathematical form of Newton's universal law of gravitation?

<p>F = G \frac{m_1 m_2}{d^2} (A)</p> Signup and view all the answers

What happens to the electric field lines when the magnitudes of the charges are different?

<p>They are more influenced by the charge with the greater magnitude (D)</p> Signup and view all the answers

What is the common feature of Coulomb's law and Newton's law of gravitation?

<p>They both describe forces that decrease with the square of the distance (C)</p> Signup and view all the answers

What is the definition of an electric field?

<p>A region of space where charges exert forces on each other (B)</p> Signup and view all the answers

How does the strength of the electric field change with distance from the charge?

<p>It decreases with distance (D)</p> Signup and view all the answers

What is the direction of the electric field at any point?

<p>The direction of the force that a positive test charge would experience (C)</p> Signup and view all the answers

What is the strength of the electric field at a point defined as?

<p>The force per unit charge (C)</p> Signup and view all the answers

What is the relationship between the electrostatic force and the magnitude of the charges?

<p>The electrostatic force is directly proportional to the magnitude of the charges (B)</p> Signup and view all the answers

What is true about electric field lines?

<p>They are closer together where the field is stronger (B)</p> Signup and view all the answers

What is the relationship between the electrostatic force and the distance between the charges?

<p>The electrostatic force is inversely proportional to the square of the distance between the charges (D)</p> Signup and view all the answers

What is the fundamental principle in physics that describes the behavior of charged particles?

<p>The electrostatic force is inversely proportional to the square of the distance between charges (D)</p> Signup and view all the answers

What is the unit of electric field strength?

<p>Newtons per coulomb (N·C⁻¹) (D)</p> Signup and view all the answers

What is the direction of the magnetic field lines around a current-carrying wire?

<p>Perpendicular to the direction of the current flow (A)</p> Signup and view all the answers

What is the shape of the magnetic field lines around a straight wire?

<p>Concentric circles (D)</p> Signup and view all the answers

What is the direction of the magnetic field lines inside a loop of wire?

<p>Converging towards the center of the loop (D)</p> Signup and view all the answers

What is the device that generates a magnetic field when an electric current flows through a coil of wire?

<p>Electromagnet (C)</p> Signup and view all the answers

What is the direction of the magnetic field lines emerging from a solenoid?

<p>Away from the north pole (B)</p> Signup and view all the answers

What is the formula for electric field strength?

<p>E = F/q (C)</p> Signup and view all the answers

What is the symbol used to represent an arrow coming out of the page when visualizing magnetic fields?

<p>⊙ (C)</p> Signup and view all the answers

What is the relationship between the strength of the magnetic field and the current?

<p>The magnetic field is proportional to the current (A)</p> Signup and view all the answers

What is the shape of the magnetic field lines around a loop of wire?

<p>Converging towards the center of the loop (B)</p> Signup and view all the answers

What is the primary purpose of electromagnets?

<p>To maximize the magnetic field strength (D)</p> Signup and view all the answers

What is the impact of power lines on the environment?

<p>They can cause bird fatalities due to collisions (D)</p> Signup and view all the answers

What is the unit of magnetic flux?

<p>Weber (Wb) (A)</p> Signup and view all the answers

What is the direction of the induced emf in Faraday's Law?

<p>Opposite to the direction of the changing magnetic flux (A)</p> Signup and view all the answers

What happens when a south pole approaches a loop?

<p>The induced emf generates a current that opposes the increase in magnetic field strength (A)</p> Signup and view all the answers

What is the effect of a stationary magnet on a nearby wire?

<p>It has no effect on the wire (B)</p> Signup and view all the answers

What is the purpose of installing markers on power lines?

<p>To make the power lines more visible to birds (B)</p> Signup and view all the answers

What is the role of Lenz's Law in Faraday's Law of electromagnetic induction?

<p>It determines the direction of the induced emf (B)</p> Signup and view all the answers

What is the formula for magnetic flux?

<p>$\phi = B A \cos \theta $ (C)</p> Signup and view all the answers

What is the impact of the magnetic fields generated by power lines on humans?

<p>They are typically of very low frequency and are not considered harmful to humans at commonly encountered levels (B)</p> Signup and view all the answers

What is the purpose of electromagnetic induction in electrical generators?

<p>To convert mechanical energy into electrical energy (D)</p> Signup and view all the answers

What is the direction of the induced emf according to Lenz's Law?

<p>Opposite to the change in magnetic flux (C)</p> Signup and view all the answers

What is the unit of voltage?

<p>Volt (B)</p> Signup and view all the answers

What is the formula for Ohm's Law?

<p>I = V/R (A)</p> Signup and view all the answers

What type of conductors obey Ohm's Law?

<p>Ohmic conductors (C)</p> Signup and view all the answers

What is the characteristic of a series circuit?

<p>The current is the same through all components (A)</p> Signup and view all the answers

How is the total resistance calculated in a parallel circuit?

<p>It is the reciprocal of the sum of the reciprocals of the resistances of all the resistors (D)</p> Signup and view all the answers

What is the effect of temperature on the resistance of non-ohmic conductors?

<p>It changes (D)</p> Signup and view all the answers

What is the graph of current vs. voltage for ohmic conductors?

<p>A straight line (A)</p> Signup and view all the answers

What is an example of a non-ohmic conductor?

<p>Light bulbs (A)</p> Signup and view all the answers

What is the total voltage in a series circuit?

<p>The sum of the voltages over all resistors (A)</p> Signup and view all the answers

What is the total current in a parallel circuit?

<p>The sum of the currents through each resistor (B)</p> Signup and view all the answers

What is the unit of measurement for power?

<p>Watts (A)</p> Signup and view all the answers

What is the formula for electrical power?

<p>P = I * V (B)</p> Signup and view all the answers

What is the relationship between power and current?

<p>Power is directly proportional to the current (D)</p> Signup and view all the answers

What is the formula for electrical energy?

<p>E = P * t (D)</p> Signup and view all the answers

What is the unit of measurement for electrical energy?

<p>Joules (B)</p> Signup and view all the answers

What is the conversion factor from watts to kilowatts?

<p>Divide by 1000 (D)</p> Signup and view all the answers

What is the formula for calculating the cost of electricity?

<p>Cost = Energy * Cost per kilowatt-hour (C)</p> Signup and view all the answers

What is the advantage of using the formula P = I^2 * R?

<p>It is useful when the current and resistance are known (B)</p> Signup and view all the answers

What type of covalent bond occurs between two identical non-metal atoms?

<p>Non-Polar Covalent Bond (C)</p> Signup and view all the answers

Which of the following molecules is likely to be polar?

<p>H2O (B)</p> Signup and view all the answers

What is the primary factor that determines the type of bond formed between two atoms?

<p>Electronegativity (B)</p> Signup and view all the answers

What is the characteristic of a non-polar molecule?

<p>Even distribution of charges (C)</p> Signup and view all the answers

What is the relationship between molecular polarity and solubility?

<p>Polar molecules dissolve well in polar solvents (B)</p> Signup and view all the answers

What is the definition of bond length?

<p>The distance between the nuclei of two adjacent atoms when they form a bond (C)</p> Signup and view all the answers

What is the factor that influences bond strength?

<p>All of the above (D)</p> Signup and view all the answers

What happens to the system's energy when atoms approach each other?

<p>The energy decreases initially (B)</p> Signup and view all the answers

What is the characteristic of a polar covalent bond?

<p>Unequal sharing of electrons (B)</p> Signup and view all the answers

What is the relationship between bond energy and bond strength?

<p>Higher bond energy indicates stronger bonds (A)</p> Signup and view all the answers

What represents the central atom in a 3D visualization of a molecule?

<p>Red balls (B)</p> Signup and view all the answers

What is the geometry of a molecule with 3 bonding pairs and 1 lone pair?

<p>Trigonal Pyramidal (A)</p> Signup and view all the answers

What is the ability of an atom to attract electrons towards itself?

<p>Electronegativity (D)</p> Signup and view all the answers

What is the range of electronegativity values for elements except noble gases?

<p>0 to 4 (C)</p> Signup and view all the answers

What type of bond is formed when the electronegativity difference between two atoms is greater than 2.1?

<p>Ionic Bond (A)</p> Signup and view all the answers

What is the formula for a molecule with 2 bonding pairs and 2 lone pairs?

<p>AX₂E₂ (D)</p> Signup and view all the answers

What is the geometry of a molecule with 4 bonding pairs and 0 lone pairs?

<p>Tetrahedral (C)</p> Signup and view all the answers

What is the step in predicting molecular shape that involves determining the total number of bonding pairs and lone pairs?

<p>Count Electron Pairs (A)</p> Signup and view all the answers

What is the importance of electronegativity in predicting molecular behavior?

<p>It influences the polarity of molecules (D)</p> Signup and view all the answers

What is the name of the scientist who introduced the concept of electronegativity?

<p>Linus Pauling (A)</p> Signup and view all the answers

What is the term for the point where the system's energy is minimized, and the bond forms, resulting in a specific bond length?

<p>Minimum Energy Point (B)</p> Signup and view all the answers

What is the force that occurs between an ion and a polar molecule?

<p>Ion-Dipole Forces (C)</p> Signup and view all the answers

What is the term for the energy difference between the bonded state and the state where atoms are far apart?

<p>Bond Energy (D)</p> Signup and view all the answers

What is the force that occurs between a polar molecule and a non-polar molecule, resulting in a temporary dipole in the non-polar molecule?

<p>Ion-Induced Dipole Forces (B)</p> Signup and view all the answers

What is the term for the forces that act between molecules?

<p>Intermolecular Forces (C)</p> Signup and view all the answers

What is the type of intermolecular force that occurs in molecules where hydrogen is covalently bonded to highly electronegative atoms like oxygen, nitrogen, or fluorine?

<p>Hydrogen Bonds (A)</p> Signup and view all the answers

What is the result of increasing the distance between atoms in a bond?

<p>Repulsive forces dominate (C)</p> Signup and view all the answers

What is the term for the point on a graph where the bond forms, representing the bond length and bond energy?

<p>X (D)</p> Signup and view all the answers

What is the type of intermolecular force that occurs between polar molecules?

<p>Dipole-Dipole Forces (D)</p> Signup and view all the answers

What is the difference between intermolecular and interatomic forces?

<p>Intermolecular forces occur between molecules, while interatomic forces occur within molecules (B)</p> Signup and view all the answers

What is the primary reason why atoms form bonds?

<p>To achieve a more stable electron configuration (A)</p> Signup and view all the answers

What is the formula to calculate the cost of running an appliance?

<p>Cost = Power (kW) * Time (hours) * Cost per kWh (D)</p> Signup and view all the answers

What is the type of bond formed when two atoms share one pair of electrons?

<p>Single bond (C)</p> Signup and view all the answers

What is the purpose of VSEPR theory?

<p>To predict the shape of molecules (A)</p> Signup and view all the answers

What determines the geometry of a molecule according to VSEPR theory?

<p>The number of electron pairs around a central atom (A)</p> Signup and view all the answers

What is the result of the attractive forces dominating between two atoms?

<p>A bond is formed (C)</p> Signup and view all the answers

What is the type of covalent bond where both electrons come from the same atom?

<p>Dative covalent bond (D)</p> Signup and view all the answers

What is the importance of molecular shape?

<p>All of the above (D)</p> Signup and view all the answers

What is the primary force that determines whether a bond will form?

<p>The interaction of attractive and repulsive forces (B)</p> Signup and view all the answers

What represents the valence electrons around an atom's chemical symbol?

<p>Lewis diagram (A)</p> Signup and view all the answers

What is the primary reason why water remains in a liquid state under most environmental conditions?

<p>Its high heat of vaporization (D)</p> Signup and view all the answers

What is the result of the strong hydrogen bonds between water molecules?

<p>Higher phase transition temperatures (A)</p> Signup and view all the answers

What is the significance of water's high heat of vaporization in regulating body temperature?

<p>It absorbs a large amount of heat from the body (B)</p> Signup and view all the answers

Why does ice float when it solidifies?

<p>Due to its lower density in solid phase (D)</p> Signup and view all the answers

What is the result of the interaction between water molecules and ionic compounds?

<p>The hydration of ions (B)</p> Signup and view all the answers

Why do non-polar substances not dissolve well in water?

<p>Due to the lack of attraction between water molecules and non-polar molecules (D)</p> Signup and view all the answers

What is the significance of water's solvent properties in biological functions?

<p>They facilitate the transport of nutrients and waste products (A)</p> Signup and view all the answers

What is the role of water in environmental processes?

<p>It transports minerals from the soil (D)</p> Signup and view all the answers

Why is water an excellent solvent for many ionic and polar substances?

<p>Due to its ability to form hydrogen bonds (A)</p> Signup and view all the answers

What is the consequence of ice sinking instead of floating?

<p>It would prevent life from existing on Earth (D)</p> Signup and view all the answers

Which of the following is a result of strong intermolecular forces?

<p>Higher viscosity (D)</p> Signup and view all the answers

What is the primary reason for water's high specific heat?

<p>The hydrogen bonds between water molecules (A)</p> Signup and view all the answers

What is the reason for the large temperature range over which water can exist as a liquid?

<p>The strong hydrogen bonds between water molecules (A)</p> Signup and view all the answers

What is the result of increasing the number of carbon atoms in an organic compound like alkanes?

<p>An increase in boiling point and melting point (D)</p> Signup and view all the answers

What is the primary factor that determines the melting and boiling points of a substance?

<p>The strength of the intermolecular forces (D)</p> Signup and view all the answers

Which of the following is a characteristic of a substance with strong intermolecular forces?

<p>High viscosity (B)</p> Signup and view all the answers

What is the result of the unique microscopic structure of water?

<p>The formation of strong hydrogen bonds (C)</p> Signup and view all the answers

What is the purpose of the absorption of infra-red radiation by water?

<p>To regulate the Earth's climate (B)</p> Signup and view all the answers

What is the effect of increasing the size of molecules on their intermolecular forces?

<p>An increase in intermolecular forces (D)</p> Signup and view all the answers

What is the direction of the electrostatic force between two like charges?

<p>Repulsive (A)</p> Signup and view all the answers

What happens to the electrostatic force between two charges when the distance between them decreases?

<p>It increases (D)</p> Signup and view all the answers

What is the electrostatic force proportional to?

<p>The product of the charges (A)</p> Signup and view all the answers

What is the similarity between Coulomb's law and Newton's law of gravitation?

<p>Both are inverse square laws (B)</p> Signup and view all the answers

What is the unit of the proportionality constant k in Coulomb's law?

<p>N·m^2/C^2 (A)</p> Signup and view all the answers

What is the direction of the electrostatic force between two unlike charges?

<p>Attractive (C)</p> Signup and view all the answers

What happens to the electrostatic force between two charges when the magnitude of the charges increases?

<p>It increases (D)</p> Signup and view all the answers

What is the physical quantity represented by the symbol Q in Coulomb's law?

<p>Charge (B)</p> Signup and view all the answers

What is the effect of increasing the distance between two charges on the electrostatic force between them?

<p>The electrostatic force decreases by a factor of four. (D)</p> Signup and view all the answers

What is the significance of the electrostatic constant in Coulomb's law?

<p>It is a fundamental constant of nature with a specific value. (D)</p> Signup and view all the answers

What is the relationship between the electrostatic force and the magnitude of the charges?

<p>The electrostatic force is directly proportional to the product of the magnitudes of the charges. (A)</p> Signup and view all the answers

What is the common feature of Coulomb's law and Newton's law of gravitation?

<p>They describe forces that are inversely proportional to the square of the distance between particles. (C)</p> Signup and view all the answers

What is the definition of an electric field?

<p>A region of space in which a charge experiences a force. (D)</p> Signup and view all the answers

What is the direction of the electric field at a point in space?

<p>The direction of the force that a positive test charge would experience if placed at that point. (B)</p> Signup and view all the answers

What happens to the electrostatic force between two charges when the magnitude of the charges increases?

<p>The electrostatic force increases. (D)</p> Signup and view all the answers

What is the significance of the inverse-square relationship in Coulomb's law?

<p>It indicates that the electrostatic force decreases with the distance between charges. (C)</p> Signup and view all the answers

What is the fundamental principle in physics that describes the behavior of charged particles?

<p>The principle of inverse-square law. (C)</p> Signup and view all the answers

What is the common feature of the electrostatic force and the gravitational force?

<p>They both follow an inverse-square relationship. (A)</p> Signup and view all the answers

What is the unit of electric field strength?

<p>N·C^(-1) (A)</p> Signup and view all the answers

What is the direction of the magnetic field lines around a current-carrying wire?

<p>Perpendicular to the direction of the current (D)</p> Signup and view all the answers

What happens to the magnetic field strength when the current is increased?

<p>It increases (C)</p> Signup and view all the answers

What is the shape of the magnetic field lines around a loop of wire?

<p>Concentric circles (A)</p> Signup and view all the answers

What is the purpose of an electromagnet?

<p>To generate a magnetic field when an electric current flows through a coil of wire (D)</p> Signup and view all the answers

What is the symbol used to represent an arrow coming out of the page when visualizing magnetic fields?

<p>⊙ (A)</p> Signup and view all the answers

What is the direction of the magnetic field lines inside a solenoid?

<p>Along the axis of the solenoid (C)</p> Signup and view all the answers

What is the formula for electric field strength?

<p>E = kQ/r^2 (B)</p> Signup and view all the answers

What is the direction of the magnetic field lines around a current-carrying straight wire?

<p>Concentric circles (B)</p> Signup and view all the answers

What is the effect of increasing the distance from the source charge on the electric field strength?

<p>It decreases (B)</p> Signup and view all the answers

What is the main application of electromagnets?

<p>Electric motors and generators (A)</p> Signup and view all the answers

What is the effect of a power line on the environment?

<p>It poses a significant threat to certain bird species (B)</p> Signup and view all the answers

What is the unit of magnetic flux?

<p>Weber (C)</p> Signup and view all the answers

What is the direction of the induced current in a loop when a south pole approaches?

<p>The current flows in a way to repel the south pole (A)</p> Signup and view all the answers

What is the purpose of Faraday's Law of electromagnetic induction?

<p>To explain the principle of electromagnetic induction (A)</p> Signup and view all the answers

What is the formula for magnetic flux?

<p>φ = B A cos θ (C)</p> Signup and view all the answers

What is the effect of a changing magnetic field on a nearby wire?

<p>It generates an electric current in the wire (D)</p> Signup and view all the answers

What is the purpose of markers on power lines?

<p>To make the power lines more visible to birds (B)</p> Signup and view all the answers

What is the relationship between the induced emf and the rate of change of magnetic flux?

<p>The induced emf is directly proportional to the rate of change of magnetic flux (A)</p> Signup and view all the answers

What is the importance of Lenz's Law in Faraday's Law of electromagnetic induction?

<p>It determines the direction of the induced emf (D)</p> Signup and view all the answers

What is the principle behind electromagnetic induction in devices like inductors?

<p>Self-induction (A)</p> Signup and view all the answers

According to Lenz's Law, what is the direction of the induced current?

<p>Opposite to the change in the magnetic flux (D)</p> Signup and view all the answers

What is the relationship between current, voltage, and resistance in a circuit according to Ohm's Law?

<p>I = V/R (A)</p> Signup and view all the answers

What is the characteristic of a conductor that obeys Ohm's Law?

<p>The resistance is constant, independent of the voltage or current (A)</p> Signup and view all the answers

What is the total resistance in a series circuit?

<p>The sum of the resistances of all the resistors (D)</p> Signup and view all the answers

What is the characteristic of a non-ohmic conductor?

<p>The resistance changes with temperature (D)</p> Signup and view all the answers

What is the voltage across each resistor in a series circuit?

<p>Proportional to its resistance (C)</p> Signup and view all the answers

What is the total current in a parallel circuit?

<p>The sum of the currents through each parallel path (A)</p> Signup and view all the answers

What is the characteristic of the graph of current vs. voltage for an ohmic conductor?

<p>A straight line (D)</p> Signup and view all the answers

What is the total resistance in a parallel circuit?

<p>The reciprocal of the sum of the reciprocals of the resistances of all the resistors (C)</p> Signup and view all the answers

What is the total voltage in a series circuit?

<p>The sum of the voltages over all resistors (C)</p> Signup and view all the answers

What is the relationship between power and current in an electrical circuit?

<p>Power is directly proportional to the current (C)</p> Signup and view all the answers

What is the formula for calculating power in an electrical circuit?

<p>P = I * V (C)</p> Signup and view all the answers

What is the unit of measurement for power?

<p>Watt (W) (C)</p> Signup and view all the answers

What is the formula for calculating electrical energy?

<p>E = P * t (A)</p> Signup and view all the answers

What is the unit of measurement for electrical energy?

<p>Kilowatt-hour (kWh) (A)</p> Signup and view all the answers

What is the relationship between power and voltage in an electrical circuit?

<p>Power is directly proportional to the voltage (A)</p> Signup and view all the answers

What is the advantage of using the formula P = I^2 * R to calculate power?

<p>It is used when the current and resistance are known (A)</p> Signup and view all the answers

What is the purpose of calculating the total energy consumed by an electrical device?

<p>To calculate the cost of electricity (D)</p> Signup and view all the answers

What is the conversion factor to convert power from watts to kilowatts?

<p>Divide by 1000 (C)</p> Signup and view all the answers

What is the shape of a molecule with 2 bonding pairs and 2 lone pairs?

<p>Bent or Angular (A)</p> Signup and view all the answers

What is the purpose of electronegativity in chemistry?

<p>All of the above (D)</p> Signup and view all the answers

What is the general formula for a molecule with 3 bonding pairs and 1 lone pair?

<p>AX₃E (A)</p> Signup and view all the answers

What is the difference between the electronegativity values of two atoms used to determine?

<p>The type of bond between the atoms (C)</p> Signup and view all the answers

What is the molecular shape of BeCl₂?

<p>Linear (C)</p> Signup and view all the answers

What is the concept of electronegativity used to explain?

<p>Why some atoms attract electrons more strongly than others (B)</p> Signup and view all the answers

What is the molecular shape of NH₃?

<p>Trigonal Pyramidal (C)</p> Signup and view all the answers

What is the electronegativity value of an element used to determine?

<p>The type of bond it forms with other atoms (B)</p> Signup and view all the answers

What is the purpose of the Lewis diagram in predicting molecular shape?

<p>To determine the number of bonding pairs and lone pairs (D)</p> Signup and view all the answers

What is the shape of a molecule with 4 bonding pairs and 0 lone pairs?

<p>Tetrahedral (A)</p> Signup and view all the answers

What is the point where the bond forms and the bond length is established?

<p>Energy minimum (C)</p> Signup and view all the answers

What is the force that acts between a polar molecule and a non-polar molecule?

<p>Ion-induced dipole force (C)</p> Signup and view all the answers

What is the difference between intermolecular and interatomic forces?

<p>Interatomic forces occur within molecules, while intermolecular forces occur between molecules (B)</p> Signup and view all the answers

What is the type of intermolecular force that occurs between polar molecules?

<p>Dipole-dipole force (D)</p> Signup and view all the answers

What is the result of strong intermolecular forces in a substance?

<p>The substance is a solid (B)</p> Signup and view all the answers

What is the direction of the electric field at a point in space?

<p>The direction in which a positive test charge would move if placed at that point (D)</p> Signup and view all the answers

What is the type of intermolecular force that occurs between a polar molecule and a non-polar molecule?

<p>Dipole-induced dipole force (D)</p> Signup and view all the answers

What happens to the electric field lines when the magnitudes of the charges are different?

<p>The field lines are more densely packed around the stronger charge (A)</p> Signup and view all the answers

What is the energy difference between the bonded state and the state where atoms are far apart?

<p>Bond energy (C)</p> Signup and view all the answers

What is true about electric field lines?

<p>They point away from positive charges and towards negative charges (C)</p> Signup and view all the answers

What is the strength of the electric field at a point defined as?

<p>The force per unit charge that a test charge would experience at that point (C)</p> Signup and view all the answers

What is the type of intermolecular force that occurs between non-polar molecules?

<p>Induced dipole force (D)</p> Signup and view all the answers

What is the result of weak intermolecular forces in a substance?

<p>The substance is a gas (D)</p> Signup and view all the answers

What happens to a positive test charge around a negative charge?

<p>It experiences an attractive force (A)</p> Signup and view all the answers

What is the purpose of drawing electric field lines?

<p>To show the direction of the force experienced by a test charge (B)</p> Signup and view all the answers

What is the type of intermolecular force that occurs between a polar molecule and an ion?

<p>Ion-dipole force (A)</p> Signup and view all the answers

What is the direction of the electric field around two like charges of equal magnitude?

<p>The electric field lines point away from both charges (C)</p> Signup and view all the answers

What is the relationship between the electric field strength and the distance from the charge?

<p>The electric field strength decreases with distance from the charge (D)</p> Signup and view all the answers

What is true about the electric field around a single positive charge?

<p>The electric field lines point away from the charge (C)</p> Signup and view all the answers

What is the purpose of electric field lines?

<p>To represent the force experienced by a test charge (B)</p> Signup and view all the answers

What is the main reason for water having a high specific heat?

<p>The strong hydrogen bonds between water molecules (B)</p> Signup and view all the answers

What is the result of stronger intermolecular forces in a substance?

<p>Higher melting and boiling points (C)</p> Signup and view all the answers

What is the primary reason for water's ability to absorb and store heat energy?

<p>The vibrational and rotational movements of water molecules (C)</p> Signup and view all the answers

What is the relationship between the number of carbon atoms in an alkane and its boiling point?

<p>The boiling point increases as the number of carbon atoms increases (A)</p> Signup and view all the answers

What is the result of stronger intermolecular forces in a substance in terms of viscosity?

<p>The substance becomes more viscous (D)</p> Signup and view all the answers

What is the primary reason for the large temperature range over which water can exist as a liquid?

<p>The strong hydrogen bonds between water molecules (C)</p> Signup and view all the answers

What is the result of weaker intermolecular forces in a substance in terms of evaporation?

<p>The substance evaporates more quickly (C)</p> Signup and view all the answers

What is the primary reason for the difference in boiling points between water and other molecular compounds of similar size and mass?

<p>The strong hydrogen bonds between water molecules (C)</p> Signup and view all the answers

What is the result of stronger intermolecular forces in a substance in terms of surface tension?

<p>The surface tension increases (D)</p> Signup and view all the answers

What is the primary reason for metals having high thermal conductivity?

<p>The presence of free electrons (B)</p> Signup and view all the answers

What is the purpose of estimating electricity bills based on usage patterns and appliance power ratings?

<p>To calculate the consumption and costs of electrical appliances (C)</p> Signup and view all the answers

Why do atoms form bonds?

<p>To achieve a more stable electron configuration (B)</p> Signup and view all the answers

What is the main force responsible for the formation of a chemical bond?

<p>Attractive force between the nucleus of one atom and the electrons of another (C)</p> Signup and view all the answers

What is the purpose of Lewis diagrams?

<p>To represent the valence electrons around an atom's chemical symbol (C)</p> Signup and view all the answers

What is the definition of a covalent bond?

<p>A type of chemical bond where pairs of electrons are shared between atoms (D)</p> Signup and view all the answers

What is the importance of molecular shape?

<p>It influences the physical properties of a molecule (D)</p> Signup and view all the answers

What is the purpose of VSEPR theory?

<p>To determine the molecular shape of a molecule (D)</p> Signup and view all the answers

What is the first step in determining the molecular shape of a molecule using VSEPR theory?

<p>Draw the Lewis diagram of the molecule (C)</p> Signup and view all the answers

What is the definition of a dative covalent bond?

<p>A type of covalent bond where both electrons in the bond come from the same atom (D)</p> Signup and view all the answers

What is the formula to calculate the cost of running an electrical appliance?

<p>Cost = Power (kW) × Time (hours) × Cost per kWh (B)</p> Signup and view all the answers

What is the main reason why water remains in the liquid state under most environmental conditions?

<p>Strong intermolecular forces (A)</p> Signup and view all the answers

What is the energy required to change a given quantity of a substance into a gas?

<p>Heat of vaporization (A)</p> Signup and view all the answers

Why does ice float as it solidifies?

<p>Because ice is less dense than liquid water (A)</p> Signup and view all the answers

What is the result of the strong hydrogen bonds between water molecules?

<p>All of the above (D)</p> Signup and view all the answers

Why can water dissolve many ionic and polar substances?

<p>Because water is a polar solvent (C)</p> Signup and view all the answers

What is the principle that summarizes the dissolution of substances in water?

<p>Like dissolves like (B)</p> Signup and view all the answers

What is the role of water in biological functions?

<p>All of the above (D)</p> Signup and view all the answers

Why does sweat evaporation from the skin provide a cooling effect?

<p>Because it absorbs a large amount of heat from the body (B)</p> Signup and view all the answers

What is the significance of the open hexagonal structure in ice?

<p>It takes up more space than the arrangement of molecules in liquid water (D)</p> Signup and view all the answers

Why is water an excellent solvent for many ionic and polar substances?

<p>Because it is a polar solvent (A)</p> Signup and view all the answers

What is the main difference between non-polar and polar covalent bonds?

<p>The equality of electron sharing (B)</p> Signup and view all the answers

Which of the following is a characteristic of polar molecules?

<p>One end with a slightly positive charge and one end with a slightly negative charge (D)</p> Signup and view all the answers

What determines the strength of a bond between two atoms?

<p>All of the above (D)</p> Signup and view all the answers

What is the main factor that influences the polarity of a molecule?

<p>The electronegativity of the atoms (D)</p> Signup and view all the answers

What is the result of the attractive and repulsive forces between atoms when they form a bond?

<p>A decrease in energy (A)</p> Signup and view all the answers

What is the relationship between bond energy and the stability of a molecule?

<p>Higher bond energy indicates higher stability (B)</p> Signup and view all the answers

What is the main difference between non-polar and polar molecules?

<p>The distribution of charges (D)</p> Signup and view all the answers

What is the effect of electronegativity on the polarity of a bond?

<p>It increases the polarity of the bond (D)</p> Signup and view all the answers

What is the relationship between the melting and boiling points of polar molecules and non-polar molecules?

<p>Polar molecules have higher melting and boiling points (D)</p> Signup and view all the answers

What is the main factor that determines the solubility of a molecule in a solvent?

<p>The polarity of the molecule (C)</p> Signup and view all the answers

What happens to the electric field lines around a positive charge and a negative charge when they are placed next to each other?

<p>The electric field lines start from the positive charge and end at the negative charge. (D)</p> Signup and view all the answers

What is the direction of the electric field around a negative charge?

<p>The electric field lines point towards the negative charge. (A)</p> Signup and view all the answers

What happens to the electric field lines when the magnitudes of the charges are different?

<p>The electric field lines are denser around the stronger charge. (D)</p> Signup and view all the answers

What is the definition of the strength of the electric field at a point?

<p>The force per unit charge that a test charge would experience at that point. (B)</p> Signup and view all the answers

What is the direction of the electric field lines around two positive charges of equal magnitude?

<p>The electric field lines point away from each charge. (B)</p> Signup and view all the answers

What is the purpose of drawing electric field lines?

<p>To represent the direction of the electric field. (B)</p> Signup and view all the answers

What happens to the electric field lines when two like charges are placed next to each other?

<p>The electric field lines point away from both charges. (B)</p> Signup and view all the answers

What is the relationship between the electric field lines and the strength of the electric field?

<p>The electric field lines are denser where the electric field is stronger. (C)</p> Signup and view all the answers

What is the direction of the force experienced by a positive test charge around a negative charge?

<p>The force is attractive. (A)</p> Signup and view all the answers

What is the purpose of drawing continuous electric field lines?

<p>To show the direction of the electric field. (D)</p> Signup and view all the answers

What is the unit of electric field strength?

<p>Newtons per coulomb (C)</p> Signup and view all the answers

What is the direction of the magnetic field lines around a current-carrying wire?

<p>Perpendicular to the direction of the current (B)</p> Signup and view all the answers

What is the shape of the magnetic field lines around a loop of wire?

<p>Magnetic dipole with a distinct north and south pole (C)</p> Signup and view all the answers

What is the relationship between the strength of the magnetic field and the current?

<p>The magnetic field strength is directly proportional to the current (A)</p> Signup and view all the answers

What is the symbol used to represent an arrow coming out of the page when visualizing magnetic fields?

<p>⊙ (A)</p> Signup and view all the answers

What is the direction of the magnetic field lines inside a loop of wire?

<p>Denser inside the loop (A)</p> Signup and view all the answers

What is the device that generates a magnetic field when an electric current flows through a coil of wire?

<p>Electromagnet (A)</p> Signup and view all the answers

What is the shape of the magnetic field lines around a straight wire?

<p>Concentric circles (B)</p> Signup and view all the answers

What is the direction of the magnetic field lines emerging from a solenoid?

<p>Perpendicular to the direction of the current (B)</p> Signup and view all the answers

What is the formula for electric field strength?

<p>E = F/q (A)</p> Signup and view all the answers

What is the primary factor that determines the strength of the electrostatic force between two point charges?

<p>Magnitude of the charges (B)</p> Signup and view all the answers

What is the significance of the inverse-square relationship in Coulomb's law and Newton's law of gravitation?

<p>It illustrates the importance of distance in the interaction between particles (C)</p> Signup and view all the answers

What is the electric field defined as?

<p>A region of space where a positive test charge will experience a force (B)</p> Signup and view all the answers

What happens to the electrostatic force between two charges when the distance between them triples?

<p>It decreases by a factor of nine (B)</p> Signup and view all the answers

What is the fundamental similarity between Coulomb's law and Newton's law of gravitation?

<p>Both laws describe forces that are inversely proportional to the square of the distance between particles (B)</p> Signup and view all the answers

What is the significance of the electrostatic constant in Coulomb's law?

<p>It is a proportionality constant that relates the electrostatic force to the product of the charges and the distance between them (A)</p> Signup and view all the answers

What is the relationship between the electrostatic force and the magnitude of the charges?

<p>The electrostatic force is directly proportional to the product of the charges (C)</p> Signup and view all the answers

What is the direction of the electric field at a point in space?

<p>The direction of the force that a positive test charge would experience if placed at that point (A)</p> Signup and view all the answers

What is the significance of the similarity in the mathematical form of Coulomb's law and Newton's law of gravitation?

<p>It illustrates a common principle in physics where forces diminish with the square of the distance between interacting particles (B)</p> Signup and view all the answers

What can be inferred about the electrostatic force between two point charges if the distance between them is halved?

<p>The electrostatic force will increase by a factor of four (A)</p> Signup and view all the answers

What is the primary function of electromagnets?

<p>To maximize magnetic field strength (C)</p> Signup and view all the answers

What is the effect of a power line on the environment?

<p>It poses a significant threat to certain bird species (A)</p> Signup and view all the answers

What is the unit of magnetic flux?

<p>Weber (D)</p> Signup and view all the answers

What happens when a magnet is moved near a wire?

<p>A voltage is generated across the wire (D)</p> Signup and view all the answers

What is the direction of the induced current in a loop when a south pole approaches?

<p>The current flows in the opposite direction of the magnetic field (D)</p> Signup and view all the answers

What is the formula for magnetic flux?

<p>Φ = B × A cos(θ) (D)</p> Signup and view all the answers

What is the purpose of installing markers on power lines?

<p>To make power lines more visible to birds (A)</p> Signup and view all the answers

What is the role of Lenz's Law in Faraday's Law of electromagnetic induction?

<p>It determines the direction of the induced emf (A)</p> Signup and view all the answers

What is the effect of a changing magnetic field on a nearby wire?

<p>It induces an emf (A)</p> Signup and view all the answers

What is the relationship between the magnetic field strength and the current in a solenoid?

<p>The magnetic field strength is directly proportional to the current (C)</p> Signup and view all the answers

What is the primary function of electromagnetic induction in electrical generators?

<p>To convert mechanical energy into electrical energy (C)</p> Signup and view all the answers

What is the relationship between the voltage and current in a conductor according to Ohm's Law?

<p>The voltage is directly proportional to the current (D)</p> Signup and view all the answers

What is the characteristic of a non-ohmic conductor?

<p>The resistance changes with temperature (C)</p> Signup and view all the answers

What is the total resistance in a parallel circuit?

<p>The reciprocal of the sum of the reciprocals of the resistances of all the resistors (B)</p> Signup and view all the answers

What is the direction of the induced emf according to Lenz's Law?

<p>In the opposite direction to the change in magnetic flux (D)</p> Signup and view all the answers

What is the purpose of a conductor in an electric circuit?

<p>To facilitate the flow of electric current (B)</p> Signup and view all the answers

What is the relationship between the current and resistance in a circuit according to Ohm's Law?

<p>The current is inversely proportional to the resistance (B)</p> Signup and view all the answers

What is the characteristic of an ohmic conductor?

<p>The graph of current vs. voltage is a straight line (C)</p> Signup and view all the answers

What is the total resistance in a series circuit?

<p>The sum of the resistances of all the resistors (D)</p> Signup and view all the answers

What is the purpose of Lenz's Law?

<p>To ensure that the direction of the induced emf always works to counteract the change that caused it (A)</p> Signup and view all the answers

What is the relationship between the power and voltage in an electric circuit?

<p>Power is directly proportional to the voltage. (C)</p> Signup and view all the answers

What is the shape of the molecule BeCl₂?

<p>Linear (B)</p> Signup and view all the answers

What is the formula for calculating electrical energy?

<p>E = P × t (A)</p> Signup and view all the answers

What is the purpose of electronegativity in chemistry?

<p>To determine the polarity of molecules (A)</p> Signup and view all the answers

What is the unit of measurement for power?

<p>Watt (C)</p> Signup and view all the answers

What is the geometry of the molecule BF₃?

<p>Trigonal Planar (B)</p> Signup and view all the answers

What is the formula for calculating power in an electric circuit?

<p>P = I × V (D)</p> Signup and view all the answers

What is the concept of electronegativity used to explain?

<p>Why some atoms attract electrons more strongly than others (B)</p> Signup and view all the answers

What is the relationship between the power and current in an electric circuit?

<p>Power is directly proportional to the current. (D)</p> Signup and view all the answers

What is the unit of measurement for electrical energy?

<p>Kilowatt-hour (A)</p> Signup and view all the answers

What is the geometry of the molecule NH₃?

<p>Trigonal Pyramidal (C)</p> Signup and view all the answers

What is the formula for calculating power when the current and resistance are known?

<p>P = I² × R (D)</p> Signup and view all the answers

What is the type of bond formed when the electronegativity difference between two atoms is between 0.1 and 1?

<p>Weak Polar Covalent Bond (D)</p> Signup and view all the answers

What is the role of Linus Pauling in the concept of electronegativity?

<p>He introduced the concept of electronegativity (C)</p> Signup and view all the answers

What is the formula for calculating power when the voltage and resistance are known?

<p>P = V² / R (D)</p> Signup and view all the answers

What is the purpose of calculating the total energy consumption in kilowatt-hours?

<p>To calculate the cost of electricity (C)</p> Signup and view all the answers

What is the shape of a molecule determined by?

<p>The number of bonding pairs and lone pairs (C)</p> Signup and view all the answers

What is the relationship between the electrical energy and power?

<p>Electrical energy is the product of power and time. (A)</p> Signup and view all the answers

What is the purpose of visualizing molecular shapes in 3D?

<p>To understand the arrangement of atoms in space (A)</p> Signup and view all the answers

What is the type of bond formed when the electronegativity difference between two atoms is greater than 2?

<p>Ionic Bond (A)</p> Signup and view all the answers

What is the primary reason for the high specific heat of water?

<p>The presence of strong intermolecular forces between water molecules (A)</p> Signup and view all the answers

Which of the following properties of water is responsible for its ability to moderate the Earth's climate?

<p>Ability to absorb infra-red radiation (B), High specific heat (C)</p> Signup and view all the answers

What is the effect of increasing the magnitude of the charges on the electrostatic force between them?

<p>The electrostatic force increases (B)</p> Signup and view all the answers

What is the relationship between the electrostatic force and the distance between the charges?

<p>The electrostatic force is inversely proportional to the square of the distance (D)</p> Signup and view all the answers

What is the result of strong intermolecular forces in a substance?

<p>High viscosity and density (C)</p> Signup and view all the answers

What is the primary reason for the unique properties of water?

<p>The strong intermolecular forces between water molecules (D)</p> Signup and view all the answers

What is the similarity between Coulomb's law and Newton's universal law of gravitation?

<p>Both laws represent the force exerted by particles that interact by means of a field (A)</p> Signup and view all the answers

What is the significance of the electrostatic constant in Coulomb's law?

<p>It is a proportionality constant that relates the electrostatic force to the product of the charges and the distance between them (B)</p> Signup and view all the answers

What is the result of increasing the number of carbon atoms in organic compounds like alkanes?

<p>Higher boiling and melting points (B)</p> Signup and view all the answers

What is the primary function of hydrogen bonds in water?

<p>To hold water molecules together (A)</p> Signup and view all the answers

Which of the following statements is true about the electrostatic force between two point-like charges?

<p>Like charges repel each other, while unlike charges attract each other (D)</p> Signup and view all the answers

What is the result of weak intermolecular forces in a substance?

<p>Low viscosity and density (A)</p> Signup and view all the answers

What is the effect of decreasing the distance between the charges on the electrostatic force between them?

<p>The electrostatic force increases (D)</p> Signup and view all the answers

What is the significance of the large temperature range over which water exists as a liquid?

<p>It is crucial for life on Earth (D)</p> Signup and view all the answers

What is the characteristic of the electrostatic force between two point-like charges?

<p>It is a long-range force (D)</p> Signup and view all the answers

What is the difference between Coulomb's law and Newton's universal law of gravitation?

<p>Coulomb's law is applicable to charges, while Newton's law is applicable to masses (B)</p> Signup and view all the answers

What is the primary reason for the high boiling point of water?

<p>The presence of strong intermolecular forces (A)</p> Signup and view all the answers

What is the result of the absorption of infra-red radiation by water?

<p>It acts as a heat reservoir and moderates the climate (C)</p> Signup and view all the answers

What is the primary purpose of understanding the principles of electrical power and energy?

<p>To design and manage electrical circuits effectively (D)</p> Signup and view all the answers

What is the primary reason why atoms form bonds?

<p>To achieve a more stable electron configuration (C)</p> Signup and view all the answers

What is the function of Lewis diagrams?

<p>To represent the valence electrons around an atom's chemical symbol (A)</p> Signup and view all the answers

What is the type of chemical bond where pairs of electrons are shared between atoms?

<p>Covalent bond (D)</p> Signup and view all the answers

What determines the shape of a molecule?

<p>The arrangement of electron pairs around a central atom (D)</p> Signup and view all the answers

What is the importance of molecular shape?

<p>It determines the function and properties of a molecule (C)</p> Signup and view all the answers

What is the primary reason why water remains in the liquid state under most environmental conditions?

<p>Strong intermolecular forces (D)</p> Signup and view all the answers

What is the first step in determining the molecular shape of a molecule using VSEPR theory?

<p>Draw the Lewis diagram of the molecule (A)</p> Signup and view all the answers

What is the result of the strong hydrogen bonds between water molecules?

<p>High heat of vaporization (A)</p> Signup and view all the answers

What is the significance of water's lower density in its solid phase?

<p>It allows ice to float as it solidifies (D)</p> Signup and view all the answers

What is the result of the attractive forces dominating in the interaction between two atoms?

<p>A bond forms (A)</p> Signup and view all the answers

What is the primary reason why water is an excellent solvent for many ionic and polar substances?

<p>Its polarity (D)</p> Signup and view all the answers

What is the type of covalent bond where both electrons in the bond come from the same atom?

<p>Dative covalent bond (C)</p> Signup and view all the answers

What is the purpose of calculating the cost of running an appliance?

<p>To estimate the electricity bill based on usage patterns (B)</p> Signup and view all the answers

What is the process by which ionic compounds dissolve in water?

<p>Hydration (D)</p> Signup and view all the answers

Why do non-polar substances not dissolve well in water?

<p>Due to the lack of attraction between water molecules and non-polar molecules (C)</p> Signup and view all the answers

What is the importance of water's solvent properties in biological functions?

<p>To facilitate transport and biochemical reactions (B)</p> Signup and view all the answers

What is the result of the open hexagonal structure in ice?

<p>A lower density in its solid phase (B)</p> Signup and view all the answers

What is the significance of water's ability to float as it solidifies in the environment?

<p>It prevents entire bodies of water from freezing solid (A)</p> Signup and view all the answers

What is the role of water in environmental processes?

<p>To play a crucial role in the environment, such as in the thermal stratification and mixing of water bodies (B)</p> Signup and view all the answers

What is the main factor that determines the type of bond between two atoms?

<p>The electronegativity difference between the atoms (B)</p> Signup and view all the answers

What is the key characteristic of a polar molecule?

<p>Uneven distribution of charges (D)</p> Signup and view all the answers

What is the primary factor that influences the solubility of a molecule?

<p>Polarity of the molecule (A)</p> Signup and view all the answers

What is the definition of bond energy?

<p>The amount of energy required to break a bond (B)</p> Signup and view all the answers

What is the main factor that influences the strength of a bond?

<p>Bond length (D)</p> Signup and view all the answers

What is the result of the interaction between the attractive and repulsive forces when atoms approach each other?

<p>A decrease in energy (D)</p> Signup and view all the answers

What is the primary factor that determines the melting and boiling points of a molecule?

<p>Intermolecular forces (B)</p> Signup and view all the answers

What is the definition of electronegativity?

<p>The ability of an atom to attract electrons (B)</p> Signup and view all the answers

What is the main difference between non-polar and polar covalent bonds?

<p>The electronegativity difference between atoms (A)</p> Signup and view all the answers

What is the role of VSEPR theory in determining molecular polarity?

<p>It helps determine the molecular shape (D)</p> Signup and view all the answers

At what distance do attractive and repulsive forces balance, leading to the formation of a bond?

<p>Minimum energy point (C)</p> Signup and view all the answers

What type of graph shows the energy changes as atoms approach each other?

<p>Energy versus distance graph (D)</p> Signup and view all the answers

What is the term for the energy difference between the bonded state and the state where atoms are far apart?

<p>Bond energy (B)</p> Signup and view all the answers

What type of force occurs between a polar molecule and a non-polar molecule?

<p>Dipole-induced dipole force (A)</p> Signup and view all the answers

What is the term for the relatively strong intermolecular force that occurs between molecules with hydrogen atoms bonded to highly electronegative atoms?

<p>Hydrogen bond (C)</p> Signup and view all the answers

What is the difference between intermolecular forces and interatomic forces?

<p>Intermolecular forces occur between molecules, while interatomic forces occur within molecules (C)</p> Signup and view all the answers

What is the primary factor that determines the physical properties of a substance?

<p>Intermolecular forces (C)</p> Signup and view all the answers

What is the term for the attraction between the positive pole of one polar molecule and the negative pole of another polar molecule?

<p>Dipole-dipole force (C)</p> Signup and view all the answers

What type of force occurs between non-polar molecules?

<p>Induced dipole force (London dispersion force) (A)</p> Signup and view all the answers

What is the phase of matter that results from strong intermolecular forces?

<p>Solid (B)</p> Signup and view all the answers

Watter van die volgende is waar oor die elektrostatiese krag tussen twee puntvormige ladings?

<p>Die krag is eweredig tot die produk van die ladings en omgekeerd evenredig tot die kwadrado van die afstand tussen hulle. (C)</p> Signup and view all the answers

Wat is die naam van die wet wat die elektrostatiese krag tussen twee puntvormige ladings beskryf?

<p>Coulomb se wet (A)</p> Signup and view all the answers

Watter van die volgende is 'n vergelyking tussen die elektrostatiese krag en die swaartekrag?

<p>Albei is omgekeerd evenredig tot die kwadrado van die afstand tussen die liggame. (C)</p> Signup and view all the answers

Wie het die eerste detailstudies oor die elektrostatiese krag gedoen?

<p>Charles-Augustin de Coulomb (D)</p> Signup and view all the answers

Watter van die volgende is nie 'n eienskap van Coulomb se wet nie?

<p>Die elektrostatiese krag is eweredig tot die kwadrado van die afstand tussen die ladings. (B)</p> Signup and view all the answers

Wat is die eenheid van die elektrostatiese konstante in vrye ruimte?

<p>N·m^2/C^2 (A)</p> Signup and view all the answers

Watter van die volgende is 'n voorbeeld van 'n inverse-kwadratwet?

<p>Alle bogenoemde (C)</p> Signup and view all the answers

Watter van die volgende is nie 'nsamestellende faktor wat die elektrostatiese krag tussen twee ladings beïnvloed nie?

<p>Die massa van die ladings (A), Die snelheid van die ladings (D)</p> Signup and view all the answers

Watter eenheid word gebruik om die elektriese veldsterkte te meet?

<p>Newton per coulomb (N·C⁻¹) (C)</p> Signup and view all the answers

Watter wetenskaplike het die fundamentele beginsel in fisika ontdek wat die gedrag van gelaaide deeltjies beskryf?

<p>Coulomb (C)</p> Signup and view all the answers

Watter vorm het die magnetiese veldlyne om 'n reguit draad?

<p>Konsentriese sirkels (B)</p> Signup and view all the answers

Watter is die hoofdoel van elektromagnete?

<p>Om die sterkte van die magnetiese veld te maksimeer (D)</p> Signup and view all the answers

Watter is die verhouding tussen die sterkte van die magnetiese veld en die stroom?

<p>Die sterkte van die magnetiese veld is direk proporsionaal tot die stroom (C)</p> Signup and view all the answers

Watter eenheid word gebruik om die magnetiese flux te meet?

<p>Weber (C)</p> Signup and view all the answers

Wat is die uitwerking van 'n stilstaande magneet op 'n nabygeleë draad?

<p>Dit het geen uitwerking (A)</p> Signup and view all the answers

Watter is die doel van elektromagnete?

<p>Om 'n magnetiese veld te generators (A)</p> Signup and view all the answers

Wat is die doel van die installering van merkers op kraglyne?

<p>Om die kraglyne meer sigbaar te maak vir voëls (A)</p> Signup and view all the answers

Watter simbool word gebruik om 'n pyl uit die bladsy te verteenwoordig by die visualisering van magnetiese velde?

<p>⊙ (B)</p> Signup and view all the answers

Watter is die vorm van die magnetiese veldlyne om 'n lus van draad?

<p>Kurve lyne (C)</p> Signup and view all the answers

Watter rigting sal 'n positiewe toetslading beweeg as dit by 'n positiewe lading geplaas word?

<p>Weg van die positiewe lading af. (B)</p> Signup and view all the answers

Watter is die uitwerking van die magnetiese velde gegenereer deur kraglyne op die omgewing?

<p>Dit is.usermodel vir voëls (D)</p> Signup and view all the answers

Hoe vertoon die elektrisiteitveld lyne die sterkte van die elektrisiteitveld?

<p>Deur dikker lyne te gebruik. (A)</p> Signup and view all the answers

Watter is die eenheid van die elektriese veldsterkte?

<p>Newton per coulomb (N·C⁻¹) (D)</p> Signup and view all the answers

Wat is die rol van Lenz se Wet in Faraday se Wet van elektromagnetiese induksie?

<p>Dit bepaal die rigting van die ingebruikte elektromotiefkrag (B)</p> Signup and view all the answers

Wat is die formule vir die magnetiese flux?

<p>φ = B A cos θ (B)</p> Signup and view all the answers

Watter is die effek op die elektrisiteitveld wanneer die magnitude van die ladings verskil?

<p>Die elektrisiteitveld lyne is meer beïnvloed deur die lading met die groter magnitude. (D)</p> Signup and view all the answers

Watter is die rigting van die magnetiese veldlyne buite 'n solenoïed?

<p>Die rigting van die veldlyne is die selfde as die rigting van die stroom (C)</p> Signup and view all the answers

Watter is die-definition van die elektriese veldsterkte?

<p>Die krag per eenheid van gelaaide materiaal (A)</p> Signup and view all the answers

Watter is die uitwerking van 'n suidpool wat naderkom aan 'n lus?

<p>Dit genereer 'n elektromotiefkrag teen die rigting van die verandering in magnetiese flux (A)</p> Signup and view all the answers

Watter is die definitie van 'n elektrisiteitveld?

<p>Die gebied in ruimte waar 'n lading 'n krag ervaar. (C)</p> Signup and view all the answers

Watter is die sterkte van die elektrisiteitveld by 'n punt gedefinieer as?

<p>Die krag per eenheid van lading wat 'n toetslading by daardie punt sou ervaar. (C)</p> Signup and view all the answers

Wat is die doel van die elektromagnetiese induksie in elektrisiteitsgenerators?

<p>Om elektrisiteit te genereer (C)</p> Signup and view all the answers

Watter is die uitwerking van die magnetiese velde gegenereer deur kraglyne op menslike gesondheid?

<p>Dit het geen uitwerking (D)</p> Signup and view all the answers

Watter is die rigting van die elektrisiteitveld lyne by 'n positiewe lading?

<p>Weg van die lading af. (B)</p> Signup and view all the answers

Waar word elektromagnetiese induksie gebruik?

<p>In elektriese generatars (D)</p> Signup and view all the answers

Watter is die effek van twee soortgelyke ladings op die elektrisiteitveld?

<p>Die elektrisiteitveld lyne is swakker tussen die ladings. (B)</p> Signup and view all the answers

Watter is die rigting van die elektrisiteitveld lyne by twee ongelike ladings?

<p>Die lyne start by die positiewe lading en eindig by die negatiewe lading. (A)</p> Signup and view all the answers

Wat is die naam van die wet wat die verhouding tussen die induksie-emk en die verandering in die magnetiese vloed beskryf?

<p>Lenz se Wet (D)</p> Signup and view all the answers

Wat is die eenheid van weerstand?

<p>Ohm (Ω) (B)</p> Signup and view all the answers

Watter is die konvensie vir die tekening van elektrisiteitveld lyne?

<p>Die pyltjies op die lyne wys weg van die lading af. (D)</p> Signup and view all the answers

Waar word die weerstand in 'n stroombaan konstant gehou?

<p>By 'n konstante temperatuur (B)</p> Signup and view all the answers

Watter eenheid word gebruik om elektriese energie te meet?

<p>Kilowatt-uur (B)</p> Signup and view all the answers

Wat is die.formula om elektriese krag te bereken?

<p>P = I × V (D)</p> Signup and view all the answers

Wat is die naam van die wet wat die verhouding tussen die stroomsterkte, spanning en weerstand in 'n stroombaan beskryf?

<p>Ohm se Wet (A)</p> Signup and view all the answers

Waar word die totale weerstand in 'n serie-stroombaan bereken?

<p>Deur die weerstande te adder (A)</p> Signup and view all the answers

Watter is die relasie tussen elektriese krag en tyd?

<p>Energie is die produk van krag en tyd (B)</p> Signup and view all the answers

Waar word die spanning in 'n parallel-stroombaan dieselfde?

<p>Vir alle komponente (B)</p> Signup and view all the answers

Watter is die eenheid van elektriese krag?

<p>Watt (B)</p> Signup and view all the answers

Watter eienskap van die elektrostatiese krag tussen tweecharges word weerspieël deur die wiskundige verhouding F = k(Q1Q2)/r^2?

<p>Die krag word direk proporsioneel tot die produk van die ladings (B)</p> Signup and view all the answers

Wat is die naam van die tipe kondensator wat se weerstand verander met die temperatuur?

<p>Niet-ohmiese kondensator (D)</p> Signup and view all the answers

Wat is die.relAsie tussen elektriese krag en spannings?

<p>Krag is direk proporsioneel tot die kwadratum van die spannings (C)</p> Signup and view all the answers

Watter is die relasie tussen elektriese krag en stroom?

<p>Krag is direk proporsioneel tot die kwadratum van die stroom (D)</p> Signup and view all the answers

Watter wiskundige verhouding vertoon 'n soortgelyke struktuur as die wiskundige verhouding F = k(Q1Q2)/r^2?

<p>F = G(m1m2)/d^2 (D)</p> Signup and view all the answers

Wat is die formaat van die grafiek van stroomsterkte teenoor spanning vir 'n ohmiese kondensator?

<p>Reglyn (A)</p> Signup and view all the answers

Wat is die.formula om elektriese energie te bereken?

<p>E = P × t (D)</p> Signup and view all the answers

Waar word die totale stroomsterkte in 'n parallel-stroombaan bereken?

<p>Deur die stroomsterktes te adder (A)</p> Signup and view all the answers

Watter faktor veroorsaak dat die elektrostatiese krag tussen twee ladings vier keer kleiner word?

<p>Die afstand tussen die ladings word verdubbel (A)</p> Signup and view all the answers

Watter konsep help om te verstaan hoe ladings mekaar beïnvloed oor afstand in die ruimte?

<p>Die elektrische veld (D)</p> Signup and view all the answers

Watter is die doel van die meeteenheid kilowatt-uur?

<p>Om elektriese energie te meet (C)</p> Signup and view all the answers

Watter is die rigting van die elektrische veld by 'n punt in die ruimte?

<p>Die rigting van die krag wat op 'n positiewe toetsladingwerk (A)</p> Signup and view all the answers

Watter is die relasie tussen elektriese krag en weerstand?

<p>Krag is direk proporsioneel tot die kwadratum van die weerstand (A)</p> Signup and view all the answers

Watter verhouding word gebruik om die elektrostatiese krag tussen twee punt-ladings te beskryf?

<p>F = k(Q1Q2)/r (B)</p> Signup and view all the answers

Watter is die verband tussen elektriese krag en elektriese energie?

<p>Elektriese krag is die tempo waarop elektriese energie oorgeplaas word (D)</p> Signup and view all the answers

Watter is die belangrikste eienskap van die elektrostatiese krag tussen twee ladings?

<p>Die krag is direk proporsioneel tot die produk van die ladings (A)</p> Signup and view all the answers

Watter is die resultaat wanneer die afstand tussen twee ladings verdubbel?

<p>Die elektrostatiese krag word vier keer kleiner (A)</p> Signup and view all the answers

Watter is die verhouding tussen die elektrostatiese krag en die afstand tussen twee ladings?

<p>Die krag is omgekeerd proporsioneel tot die afstand (D)</p> Signup and view all the answers

Watter is die belangrikste geldigheid van Coulomb se wet?

<p>Die elektrostatiese krag tussen twee punt-ladings is afhanklik van die produk van die ladings (C)</p> Signup and view all the answers

Watter molekulêre vorm het 'n sentrale atoom met 2.bindingpare en 0 alleenpare?

<p>Linear (C)</p> Signup and view all the answers

Watter gevolg het 'n elektronegatiwiteitverskil van 1.5 tussen twee atome?

<p>Stark polêre kovalente binding (C)</p> Signup and view all the answers

Watter stap is noodsaaklik om die molekulêre vorm te voorspel?

<p>Al die bogenoemde (D)</p> Signup and view all the answers

Watter atoom het 'n elektronegatiwiteitwaarde van 0?

<p>Noble Gasse (D)</p> Signup and view all the answers

Watter gevolg het 'n elektronegatiwiteitverskil van 0 tussen twee atome?

<p>Niet-polêre kovalente binding (B)</p> Signup and view all the answers

Watter is die doel van die Lewisdigram?

<p>Om die valensielektrone te verteenwoordig (B)</p> Signup and view all the answers

Watter is die naam van die teorie wat die molekulêre vorm bepaal?

<p>VSEPR-teorie (C)</p> Signup and view all the answers

Watter is die naam van die wetenskaplike wat die elektronegatiwiteitkonsep ingestel het?

<p>Linus Pauling (C)</p> Signup and view all the answers

Watter is die gevolg van 'n elektronegatiwiteitverskil van 2.5 tussen twee atome?

<p>Ioniese binding (D)</p> Signup and view all the answers

Watter is die belangrikheid van elektronegatiwiteit?

<p>Al die bogenoemde (D)</p> Signup and view all the answers

Wat is die minimumenergiepunt in bindingsvorming?

<p>Waar die aantrekkings- en afstootingskragte balanseer (B)</p> Signup and view all the answers

Waaroor gaan intermolekulêre kragte?

<p>Tussen molekule (C)</p> Signup and view all the answers

Watter tipe intermolekulêre krag is 'n spesiale geval van dipool-dipoolkragte?

<p>Waterstofbindings (C)</p> Signup and view all the answers

Watter eienskap van 'n stof word beïnvloed deur intermolekulêre kragte?

<p>Fase van materie (D)</p> Signup and view all the answers

Watter intermolekulêre krag is die swakste?

<p>Induseerde-dipoolkragte (A)</p> Signup and view all the answers

Waaroor gaan interatomiese kragte?

<p>Tussen atome (B)</p> Signup and view all the answers

Watter intermolekulêre krag is die sterkste?

<p>Waterstofbindings (C)</p> Signup and view all the answers

Watter gevolg het intermolekulêre kragte op die fase van materie?

<p>Swak intermolekulêre kragte resulteer in gasse (B)</p> Signup and view all the answers

Watter eienskap van 'n molekule veroorsaak dipool-dipoolkragte?

<p>Polariteit (B)</p> Signup and view all the answers

Watter intermolekulêre krag is verantwoordelik vir die bindings tussen watermolekule?

<p>Waterstofbindings (D)</p> Signup and view all the answers

Wanneer vind 'n nie-polar covalent binding plaas?

<p>Tussen twee identiese nie-metaalatome (B)</p> Signup and view all the answers

Waarom het polar molecules 'n hoër smeltpunt as nie-polar molecules?

<p>As gevolg van die sterker intermolekulêre kragte (A)</p> Signup and view all the answers

Watter eienskap van water het die hoogste waarde?

<p>Spesifieke hitte (B)</p> Signup and view all the answers

Wat is die rede dat water 'n hoogte temperatuur van fase-oorgang het?

<p>Die sterk intermolekulêre kragte tussen watermolekules (A)</p> Signup and view all the answers

Wat is die belangrikste faktor wat die lengte van 'n chemiese binding beïnvloed?

<p>Die elektronegatiwiteit van die atome (D)</p> Signup and view all the answers

Wat is die rede waarom water 'n hoog smeltpunt en kookpunt het?

<p>Die sterkte van water se intermolekulêre kragte (A)</p> Signup and view all the answers

Wat is die belangrikste rede dat water in sy vloeistofvorm kan bly onder meeste omgewingstoestande?

<p>Die sterk intermolekulêre kragte tussen watermolekules (A)</p> Signup and view all the answers

Watter proses is verantwoordelik vir die absorpsie van infrarooi-straling deur water?

<p>Vibrasie en rotasie van watermolekule (B)</p> Signup and view all the answers

Waarom is die bindingsenergie 'n maatstaf vir die sterkte van 'n chemiese binding?

<p>Omdat dit die hoeveelheid energie is wat benodig word om die binding te verbreek (D)</p> Signup and view all the answers

Wat is die energië vereis om 'n geselekteerde hoeveelheid van 'n stof in 'n gas te verander?

<p>Warmte van verdamping (C)</p> Signup and view all the answers

Wat is die faktor wat die sterkte van 'n chemiese binding beïnvloed?

<p>Die kombinasie van die bogenoemde faktore (A)</p> Signup and view all the answers

Watter faktor beïnvloed die viskositeit van 'n vloeistof?

<p>Die sterkte van intermolekulêre kragte (C)</p> Signup and view all the answers

Watter proses is verantwoordelik vir die hoogte van water se smeltpunt en kookpunt?

<p>Waterstofbindings tussen watermolekule (C)</p> Signup and view all the answers

Waarom het nie-polar molecules 'n laer smeltpunt as polar molecules?

<p>As gevolg van die swakker intermolekulêre kragte (B)</p> Signup and view all the answers

Waarom is die hoë warmte van verdamping van water belangrik vir die regulering van liggaamstemperatuur?

<p>Omdat dit help om die temperatuur van die liggaam te verlaag (D)</p> Signup and view all the answers

Watter verandering vind plaas in die temperatuur van water wanneer die warmte-energie toegedien word?

<p>Die temperatuur van water styg Stadig (A)</p> Signup and view all the answers

Waarom is die lae digtheid van ys in die omgewing belangrik?

<p>Omdat dit help om die lewe in die omgewing moontlik te maak (B)</p> Signup and view all the answers

Wat is die belangrikste faktor wat die polariteit van 'n molecule beïnvloed?

<p>Die elektronegatiwiteit van die atome (D)</p> Signup and view all the answers

Waarom is water 'n.goed oplosmiddel vir baie ioniese en polêre stowwe?

<p>Omdat water 'n hoë polariteit het (D)</p> Signup and view all the answers

Watter eienskap van water maak dit 'n doeltreffende klimaatbuffer?

<p>Die spesifieke hitte van water (C)</p> Signup and view all the answers

Waarom is die bindingslengte specifiek vir elke paar van gebonde atome?

<p>Omdat die bindingslengte afhanklik is van die balans tussen aantrekkende en afstootende kragte (C)</p> Signup and view all the answers

Watter faktor beïnvloed die dichtheid van 'n stof?

<p>Die massa per eenheid volume (B)</p> Signup and view all the answers

Waarom het polar molecules 'n hoër bindingsenergie as nie-polar molecules?

<p>As gevolg van die sterker intermolekulêre kragte (B)</p> Signup and view all the answers

Wat is die rede dat soute oplos in water?

<p>Omdat water 'n hoë polariteit het (A)</p> Signup and view all the answers

Wat is die rol van die VSEPR-teorie in die bepaling van die molekulêre geometrie?

<p>Om die molekulêre geometrie te bepaal (D)</p> Signup and view all the answers

Watter verandering vind plaas in die temperatuur van water wanneer die warmte-energie afgegee word?

<p>Die temperatuur van water daal stadig (D)</p> Signup and view all the answers

Waarom is die rol van water as oplosmiddel belangrik in biologiese funksies?

<p>Omdat water help om stowwe te vervoer en biochemiese reaksies te fasiliteer (A)</p> Signup and view all the answers

Watter proses is verantwoordelik vir die vorming van waterstofbindings tussen watermolekule?

<p>Die polêre aard van water se molekule (A)</p> Signup and view all the answers

Waarom vorm atome verbintenisse?

<p>Om 'n volle valenselektron skil te kry (A)</p> Signup and view all the answers

Wat is die formule vir die koste van die elektrisiteit van 'n apparaat?

<p>Koste = Krag (kW) x Tyd (uur) x Pris per kWh (D)</p> Signup and view all the answers

Wanneer kom 'n kovalente bindings tot stand?

<p>Wanneer twee atome hul valenselektrone deel (C)</p> Signup and view all the answers

Wat is die funksie van die Lewis-diagram in chemie?

<p>Om die valenselektrone van 'n atoom te verteenwoordig (C)</p> Signup and view all the answers

Waarom is die molekulêre vorm belangrik in chemie?

<p>Omdat dit die fisiese eienskappe van 'n stof beïnvloed (D)</p> Signup and view all the answers

Wat is die VSEPR-teorie in chemie?

<p>Die teorie van valenselektronparenrepulsie (C)</p> Signup and view all the answers

Wat is die doel van die VSEPR-teorie?

<p>Om die molekulêre vorm te voorspel (A)</p> Signup and view all the answers

Wat is die verskil tussen 'n enkele kovalente binding en 'n dubbele kovalente binding?

<p>Die aantal valenselektrone wat gedeel word (C)</p> Signup and view all the answers

Waarom is die krag van 'n elektrisiteit belangrik in ons alledaagse lewe?

<p>Omdat dit ons toelaat om die doeltreffendheid van elektrisiteit te verbeter (B)</p> Signup and view all the answers

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