Gr 11 Physical Sciences: November Easy P(1)

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Questions and Answers

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

  • Attractive
  • Upwards
  • Repulsive (correct)
  • Parallel to each other

What happens to the electrostatic force between two point-like charges when the distance between them increases?

  • It decreases (correct)
  • It increases
  • It remains the same
  • It becomes zero

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

  • It is directly proportional (correct)
  • It is independent of the product
  • It is inversely proportional
  • It is proportional to the square of the product

Who is credited with the discovery of the electrostatic force?

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

Which of the following laws are similar in form?

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

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

<p>It is inversely proportional (A)</p> Signup and view all the answers

What is the region of space where an electric charge will experience a force?

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

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

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

What do electric field lines show?

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

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

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

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

<p>Towards the negative charge (C)</p> Signup and view all the answers

What do arrows on electric field lines indicate?

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

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

<p>They cancel out in the middle (A)</p> Signup and view all the answers

What is the effect of charges of different magnitudes on the electric field?

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

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

<p>Towards the negative charge (C)</p> Signup and view all the answers

What is the electrostatic constant in free space?

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

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

<p>Inversely proportional to the square of the distance (C)</p> Signup and view all the answers

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

<p>They both describe forces that are inversely proportional to the square of the distance (D)</p> Signup and view all the answers

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

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

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

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

What is the electric field?

<p>A region of space in which a charge will experience a force (C)</p> Signup and view all the answers

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

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

What is the significance of Coulomb's law?

<p>It provides a quantitative description of the electrostatic force (A)</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 describes the electrostatic force, while Newton's law describes the gravitational force (B)</p> Signup and view all the answers

What is the significance of the inverse-square relationship in physics?

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

What is the unit of electric field strength?

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

What is the effect of increasing the current in a wire on the magnetic field strength?

<p>It increases the magnetic field strength (B)</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 emerging from a loop of wire?

<p>In the direction of your thumb using the Right Hand Rule (B)</p> Signup and view all the answers

What is the shape of the magnetic field inside a solenoid?

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

What is the purpose of an electromagnet?

<p>To generate a magnetic field only when an electric current flows (C)</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 symbol used to represent an arrow coming out of the page when visualizing magnetic fields?

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

What is the region where the magnetic field lines are denser?

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

What is the main advantage of electromagnets over permanent magnets?

<p>They are more versatile in practical applications (B)</p> Signup and view all the answers

What is the main concern about power lines carrying electric current?

<p>They can cause fatalities to large birds (A)</p> Signup and view all the answers

What is the frequency of magnetic fields generated by power lines?

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

What is the phenomenon where a voltage is generated across a wire when a magnet is moved near it?

<p>Electromagnetic induction (C)</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 emf in a loop, according to Faraday's Law of Electromagnetic Induction?

<p>Opposing the change in magnetic flux (A)</p> Signup and view all the answers

What happens to the induced current in a conductor when a south pole of a magnet approaches a loop?

<p>It generates a magnetic field opposing the increase in magnetic field strength (D)</p> Signup and view all the answers

What is the purpose of the Right Hand Rule in electromagnetic induction?

<p>To determine the direction of the induced current (B)</p> Signup and view all the answers

What is the formula for magnetic flux through a loop of area A in the presence of a uniform magnetic field B?

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

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

<p>It does not induce any voltage (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 (B)</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 (A)</p> Signup and view all the answers

What is the unit of measurement for power?

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

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

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

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

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

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

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

What is the formula for calculating electrical energy?

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

What is vector equality?

<p>A property that states a vector can be positioned anywhere on the Cartesian plane without changing its physical meaning (D)</p> Signup and view all the answers

What is the purpose of a battery in an electrical circuit?

<p>To convert chemical potential energy into electrical energy (A)</p> Signup and view all the answers

What is the purpose of specifying the direction of a vector?

<p>To ensure accurate representation and calculation (C)</p> Signup and view all the answers

What is the method used to add vectors in two dimensions?

<p>Both a and b (C)</p> Signup and view all the answers

What is the unit of measurement for electrical energy in practical contexts?

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

What is the result of a closed vector diagram?

<p>A resultant vector with a magnitude of 0 (D)</p> Signup and view all the answers

How do you convert power from watts to kilowatts?

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

What is the formula used to calculate the magnitude of the resultant vector when dealing with perpendicular vectors?

<p>R = √(Rx^2 + Ry^2) (A)</p> Signup and view all the answers

What is the formula for calculating the cost of electricity?

<p>Cost = Energy * Cost per kWh (B)</p> Signup and view all the answers

What is the purpose of using compass directions and bearings?

<p>To specify the direction of a vector (C)</p> Signup and view all the answers

What is the significance of the tail-to-tail method?

<p>It simplifies the addition of vectors (D)</p> Signup and view all the answers

What is the result of vectors that are perpendicular?

<p>They form a right angle (A)</p> Signup and view all the answers

What is the condition for an object to experience weightlessness?

<p>When it is in a state of free fall or orbit (D)</p> Signup and view all the answers

What is the relationship between weight and mass?

<p>F_g = mg (C)</p> Signup and view all the answers

Why do astronauts in space experience weightlessness?

<p>Because they are in a state of continuous free fall around the Earth (C)</p> Signup and view all the answers

What is the goal of solving comparative problems?

<p>To calculate a quantity in terms of another known quantity (C)</p> Signup and view all the answers

What is the step in solving comparative problems where you write out equations and calculate all quantities for the given situation?

<p>Step 1 (C)</p> Signup and view all the answers

What is the principle utilized in electrical generators to convert mechanical energy into electrical energy?

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

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

<p>To oppose the change in magnetic flux (B)</p> Signup and view all the answers

What is the definition of electrical current?

<p>The rate of flow of charge through a circuit (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 (D)</p> Signup and view all the answers

What type of conductor has a constant resistance when the voltage is varied across it or the current through it is increased?

<p>Ohmic conductor (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 (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 characteristic of the current in a series circuit?

<p>The current is the same through all components (B)</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 characteristic of the voltage in a parallel circuit?

<p>The voltage is the same across all components (B)</p> Signup and view all the answers

What is the purpose of resolving a vector into its components?

<p>To break down the vector into manageable parts (A)</p> Signup and view all the answers

What is the unit of force in the International System of Units (SI)?

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

What type of force is the normal force?

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

What is the direction of the resultant force?

<p>The vector sum of all the forces (A)</p> Signup and view all the answers

What is the purpose of using trigonometric identities in resolving vectors into components?

<p>To calculate the components of the vector (A)</p> Signup and view all the answers

What is the relationship between the frictional force and the normal force?

<p>The frictional force is proportional to the normal force (A)</p> Signup and view all the answers

What is the definition of a force?

<p>Anything that can cause a change to an object (C)</p> Signup and view all the answers

What is the nature of force?

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

What is the purpose of using components in vector addition?

<p>To simplify the vector addition process (B)</p> Signup and view all the answers

What is the difference between static and kinetic friction?

<p>Static friction is present when an object is not moving, while kinetic friction is present when an object is moving (C)</p> Signup and view all the answers

What is the coefficient of friction dependent on?

<p>Pair of surfaces (C)</p> Signup and view all the answers

What is the magnitude of the force that exists in objects like ropes, chains, and struts providing support?

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

What is the purpose of a force diagram?

<p>To show all the forces acting on a system (C)</p> Signup and view all the answers

What is the direction of the kinetic frictional force?

<p>Opposite to the motion (A)</p> Signup and view all the answers

What is the normal force dependent on?

<p>Component of the gravitational force perpendicular to the slope (B)</p> Signup and view all the answers

What is the purpose of resolving forces into components?

<p>To simplify calculations (C)</p> Signup and view all the answers

What is the definition of Newton's First Law of Motion?

<p>An object continues in a state of motion unless it is acted on by an unbalanced force (D)</p> Signup and view all the answers

What is the mathematical representation of Newton's Second Law of Motion?

<p>F = ma (D)</p> Signup and view all the answers

What is the effect of acceleration on apparent weight?

<p>Apparent weight increases with acceleration (B)</p> Signup and view all the answers

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

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

What is the definition of Newton's Third Law of Motion?

<p>For every action, there is an equal and opposite reaction. (A)</p> Signup and view all the answers

What is the resultant force?

<p>The vector sum of all the forces acting on an object. (A)</p> Signup and view all the answers

What is the normal force?

<p>The force exerted by a surface to support the weight of an object. (D)</p> Signup and view all the answers

What is the frictional force?

<p>The force that opposes the motion of an object. (C)</p> Signup and view all the answers

What is the coefficient of friction?

<p>A constant for a given pair of surfaces. (B)</p> Signup and view all the answers

What is the equation for the gravitational force between two objects?

<p>F = G(m1 * m2)/d^2 (C)</p> Signup and view all the answers

What is the gravitational acceleration near the surface of the Earth?

<p>9.8 m/s^2 (D)</p> Signup and view all the answers

What is the difference between mass and weight?

<p>Mass is the amount of matter in an object, while weight is the force of gravity on an object. (C)</p> Signup and view all the answers

What is the purpose of a free body diagram?

<p>To represent the object of interest as a dot, with all forces acting on it drawn as arrows. (D)</p> Signup and view all the answers

Why is it important to resolve forces into components when dealing with inclined planes?

<p>To simplify the calculation of forces and make it easier to analyze the situation. (B)</p> Signup and view all the answers

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

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

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

<p>Both describe forces that are inversely proportional to the square of the distance. (A)</p> Signup and view all the answers

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

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

What is the definition of an electric field?

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

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

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

What is the significance of Coulomb's law?

<p>It describes the electrostatic force between two point charges. (C)</p> Signup and view all the answers

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

<p>N·m²/C² (D)</p> Signup and view all the answers

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

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

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

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

What is the significance of the inverse-square relationship in physics?

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

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

<p>It is inversely proportional to the square of the distance between the charges. (C)</p> Signup and view all the answers

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

<p>It is directly proportional to the product of the charges. (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 in Coulomb's law. (A)</p> Signup and view all the answers

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

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

What is the physical significance of the distance between the charges in Coulomb's law?

<p>It affects the magnitude of the electrostatic force. (D)</p> Signup and view all the answers

What is the physical significance of the charges in Coulomb's law?

<p>They affect the magnitude of the electrostatic force. (C)</p> Signup and view all the answers

What is the relationship between the electrostatic force and the electric field?

<p>The electric field is a measure of the electrostatic force. (B)</p> Signup and view all the answers

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

<p>It shows that the electrostatic force decreases with distance. (A)</p> Signup and view all the answers

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

<p>Away from the charge (A)</p> Signup and view all the answers

What do electric field lines show?

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

What is the unit of electric field strength?

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

What is the effect of increasing the distance between two charges on the electric field?

<p>The electric field decreases (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 wire (A)</p> Signup and view all the answers

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

<p>They repel from both charges (B)</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 strength of the electric field at a point defined as?

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

What happens to the electric field lines around two unlike charges?

<p>They start from the positive charge and end at the negative charge (D)</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 formula for electric field strength?

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

What is the effect of charges of different magnitudes on the electric field?

<p>The electric field is stronger around the stronger charge (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>⊙ (B)</p> Signup and view all the answers

What do arrows on electric field lines indicate?

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

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

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

What is the region where the magnetic field lines are denser?

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

What happens to the magnetic field strength when the current in a wire increases?

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

What is the purpose of drawing electric field lines?

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

What is the shape of the magnetic field inside a solenoid?

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

What is the advantage of electromagnets over permanent magnets?

<p>Electromagnets can be turned on and off (D)</p> Signup and view all the answers

What is the main purpose of electromagnets?

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

What is the effect on the magnetic field strength when the current in a wire is increased?

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

What is the phenomenon where a voltage is generated across a wire when a magnet is moved near it?

<p>Electromagnetic induction (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 is the effect of a stationary magnet on a wire?

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

What is the formula for magnetic flux through a loop of area A in the presence of a uniform magnetic field B?

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

What is the purpose of the Right Hand Rule in electromagnetic induction?

<p>To determine the direction of the induced current (A)</p> Signup and view all the answers

What is the main concern about power lines carrying electric current?

<p>The magnetic fields generated by the power lines (A)</p> Signup and view all the answers

What is the frequency of magnetic fields generated by power lines?

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

What is the direction of the induced emf in a loop, according to Faraday's Law of Electromagnetic Induction?

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

What is the principle behind electrical generators?

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

What is the direction of the induced current in a loop, according to Lenz's Law?

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

What is the relationship between current, voltage, and resistance in a circuit?

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

What is the characteristic of ohmic conductors?

<p>Their resistance is constant at a constant temperature (B)</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 (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 parallel path (C)</p> Signup and view all the answers

What is the purpose of using Ohm's Law in circuit analysis?

<p>To analyze circuits with resistors in series or parallel (C)</p> Signup and view all the answers

What is the difference between ohmic and non-ohmic conductors?

<p>Ohmic conductors have a constant resistance, while non-ohmic conductors do not (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 the significance of Lenz's Law in electromagnetic induction?

<p>It states that the induced current will create a magnetic field that opposes the change in the magnetic flux (A)</p> Signup and view all the answers

What is the relationship between weight and mass?

<p>F_g = m * g (A)</p> Signup and view all the answers

When does an object experience weightlessness?

<p>When it is in free fall or orbit (C)</p> Signup and view all the answers

What is the purpose of solving comparative problems?

<p>To analyze and predict the gravitational interactions between objects (B)</p> Signup and view all the answers

What is the experience of astronauts in space?

<p>They are in a state of weightlessness (A)</p> Signup and view all the answers

What is the first step in solving comparative problems?

<p>Write out equations and calculate all quantities for the given situation (D)</p> Signup and view all the answers

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

<p>P = I * V (A)</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 formula for electrical energy?

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

What is the purpose of a battery in an electrical circuit?

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

What is the formula for power in terms of current and resistance?

<p>P = I^2 / R (B)</p> Signup and view all the answers

What is the unit of measurement for power?

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

What is the formula for power in terms of voltage and resistance?

<p>P = V^2 / R (D)</p> Signup and view all the answers

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

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

What is the definition of Newton's Third Law of Motion?

<p>For every action, there is an equal and opposite reaction. (D)</p> Signup and view all the answers

What is the resultant force of an object in equilibrium?

<p>The sum of the forces acting on the object is equal to zero. (A)</p> Signup and view all the answers

What is the direction of the frictional force?

<p>Parallel to the surface. (D)</p> Signup and view all the answers

What is the formula for the gravitational force between two objects?

<p>F = Gm1m2/d^2 (A)</p> Signup and view all the answers

What is the value of the gravitational acceleration near the surface of the Earth?

<p>9.8 m/s^2 (B)</p> Signup and view all the answers

What is the difference between mass and weight?

<p>Mass is a measure of the amount of matter, while weight is a measure of the force of gravity. (A)</p> Signup and view all the answers

What is the purpose of a free body diagram?

<p>To represent all the forces acting on the object. (D)</p> Signup and view all the answers

What is the coefficient of friction?

<p>A constant that depends on the surface. (B)</p> Signup and view all the answers

What is the formula for the static frictional force?

<p>f_s = μsN (A)</p> Signup and view all the answers

What is the purpose of resolving forces into components?

<p>To deal with inclined planes. (D)</p> Signup and view all the answers

What is the process of breaking a vector into its components called?

<p>Resolving into components (C)</p> Signup and view all the answers

What is the unit of force in the International System of Units (SI)?

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

What is the force that opposes the motion of an object in contact with a surface?

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

What is the resultant force?

<p>The vector sum of all the forces acting on an object (C)</p> Signup and view all the answers

What are the two types of friction?

<p>Static and kinetic friction (B)</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 significance of vector equality in two dimensions?

<p>It means that vectors can be positioned anywhere on the plane without changing their physical meaning (D)</p> Signup and view all the answers

What is the normal force?

<p>The force that balances the gravitational force (C)</p> Signup and view all the answers

What is the angle measured counter-clockwise from the positive x-axis when resolving a vector into components?

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

What is the purpose of specifying the direction of a vector?

<p>To determine the orientation of the vector (D)</p> Signup and view all the answers

What is the resultant vector in two dimensions?

<p>The combined effect of multiple vectors acting simultaneously (B)</p> Signup and view all the answers

What is the purpose of resolving a vector into components?

<p>To simplify the vector into horizontal and vertical components (A)</p> Signup and view all the answers

What is the trigonometric identity used to determine the magnitude of the horizontal component of a vector?

<p>cos(θ) = R_x / R (D)</p> Signup and view all the answers

What is the advantage of using the tail-to-tail method for adding vectors?

<p>It can be used for any number of vectors (A)</p> Signup and view all the answers

What is a closed vector diagram?

<p>A diagram where the vectors form a polygon that returns to the origin (A)</p> Signup and view all the answers

What is the type of force that does not have to touch an object to cause a change?

<p>Non-contact force (D)</p> Signup and view all the answers

What is the formula for the magnitude of the resultant vector for perpendicular vectors?

<p>R = √(Rx^2 + Ry^2) (D)</p> Signup and view all the answers

What is the significance of compass directions and bearings in specifying vector directions?

<p>They provide a numerical way to specify directions (D)</p> Signup and view all the answers

What is the importance of understanding the principles of electrical power and energy?

<p>It is important for designing and managing electrical circuits effectively to ensure efficient use of energy (B)</p> Signup and view all the answers

What is the formula for the cost of electricity based on the power rating of an appliance and the time it is used?

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

What is the coefficient of friction?

<p>A constant for a given pair of surfaces (A)</p> Signup and view all the answers

What is the static frictional force given by?

<p>fmax,s = μsN (A)</p> Signup and view all the answers

What is the purpose of drawing force diagrams?

<p>To show the direction of forces (A)</p> Signup and view all the answers

What is the use of resolving forces into components?

<p>To simplify calculations involving inclined planes (B)</p> Signup and view all the answers

What is the definition of Newton's First Law of Motion?

<p>An object continues in a state of rest or uniform motion unless it is acted on by an unbalanced force (A)</p> Signup and view all the answers

What is the mathematical representation of Newton's Second Law of Motion?

<p>F = ma (D)</p> Signup and view all the answers

What is the effect of the component of the gravitational force parallel to the slope on an object on an inclined plane?

<p>It causes the object to accelerate down the slope (B)</p> Signup and view all the answers

What happens to the apparent weight when a lift accelerates upwards?

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

What is the purpose of drawing a free body diagram?

<p>To represent the object of interest and the forces acting on it (A)</p> Signup and view all the answers

What is the formula to find the component of a force F at an angle θ?

<p>Fx = F cos(θ) (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. (D)</p> Signup and view all the answers

What is the effect of decreasing the distance between two point-like charges on the electrostatic force?

<p>The electrostatic force increases. (B)</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 that describes the strength of the electrostatic force. (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. (C)</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 describe the force between two point-like particles and are inverse-square laws. (B)</p> Signup and view all the answers

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

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

What is the purpose of Coulomb's law?

<p>To describe the force between two point-like charges. (C)</p> Signup and view all the answers

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

<p>It is attractive for unlike charges and repulsive for like charges. (A)</p> Signup and view all the answers

What is the unit of electric field strength?

<p>Newton per coulomb (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 (A)</p> Signup and view all the answers

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

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

What is the effect of increasing the current in a wire on the magnetic field strength?

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

What is the region where the magnetic field lines are denser?

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

What is the purpose of an electromagnet?

<p>To generate a magnetic field (B)</p> Signup and view all the answers

What is the formula for electric field strength?

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

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

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

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

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

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

<p>P = I â‹… V (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 (A)</p> Signup and view all the answers

What is the unit of measurement for electrical energy?

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

What is the formula for calculating electrical energy?

<p>E = P â‹… t (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 (C)</p> Signup and view all the answers

What is the unit of measurement for power?

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

What is the main advantage of electromagnets over permanent magnets?

<p>They can be controlled by varying the current (B)</p> Signup and view all the answers

What is the formula for calculating power in terms of current and resistance?

<p>P = I^2 â‹… R (D)</p> Signup and view all the answers

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

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

What is the unit of magnetic flux?

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

What is the purpose of installing markers on power lines?

<p>To make them more visible to birds (D)</p> Signup and view all the answers

What do electric field lines show?

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

What is the advantage of using kilowatt-hours (kWh) to measure electrical energy?

<p>It is a more practical unit of energy for everyday applications (D)</p> Signup and view all the answers

What is the effect of charges of different magnitudes on the electric field?

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

What is the relationship between electrical energy and time?

<p>Electrical energy is directly proportional to time (A)</p> Signup and view all the answers

What is the formula for magnetic flux through a loop of area A in the presence of a uniform magnetic field B?

<p>Φ = B A cosθ (C)</p> Signup and view all the answers

What is the formula for calculating power in terms of voltage and resistance?

<p>P = V^2 / R (D)</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 (D)</p> Signup and view all the answers

What is the phenomenon where a voltage is generated across a wire when a magnet is moved near it?

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

What is the direction of electric field lines around a positive charge?

<p>Away from the positive charge (A)</p> Signup and view all the answers

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

<p>It does not induce any voltage (A)</p> Signup and view all the answers

What is the direction of the induced emf in a loop, according to Faraday's Law of Electromagnetic Induction?

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

What is the effect of two like charges of equal magnitude on the electric field?

<p>The electric field lines cancel out between the charges (C)</p> Signup and view all the answers

What do arrows on electric field lines indicate?

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

What happens to the induced current in a conductor when a south pole of a magnet approaches a loop?

<p>It generates a magnetic field that opposes the south pole's field (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 (B)</p> Signup and view all the answers

What is the electrostatic force between two point charges directly proportional to?

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

What is the purpose of the Right Hand Rule in electromagnetic induction?

<p>To determine the direction of the induced current (C)</p> Signup and view all the answers

What is the main concern about power lines carrying electric current?

<p>They are a significant threat to certain bird species (D)</p> Signup and view all the answers

What is the effect on the electrostatic force when the distance between the charges doubles?

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

What happens to the electric field lines around two unlike charges?

<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 electrostatic constant in free space?

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

What is the significance of drawing electric field lines?

<p>To simplify the representation of electric fields (A)</p> Signup and view all the answers

What is the significance of the inverse-square relationship in physics?

<p>It describes the decrease in force with increasing distance (B)</p> Signup and view all the answers

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

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

What is the region of space where an electric charge will experience a force?

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

What does the direction of the electric field at a point indicate?

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

What is the significance of Coulomb's law?

<p>It describes the electrostatic force between two point charges (B)</p> Signup and view all the answers

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

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

What is the property of vectors that allows them to be positioned anywhere on the Cartesian plane without changing their physical meaning?

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

What is the method used to add vectors in two dimensions?

<p>Tail-to-head method (A)</p> Signup and view all the answers

What is the formula to find the magnitude of the resultant vector for perpendicular vectors?

<p>R = √(Rx^2 + Ry^2) (B)</p> Signup and view all the answers

What is the significance of a closed vector diagram?

<p>It indicates a resultant vector with zero magnitude (D)</p> Signup and view all the answers

What is the purpose of specifying the direction of a vector?

<p>To ensure accurate representation and calculation (A)</p> Signup and view all the answers

What is the purpose of resolving a vector into its components?

<p>To find the horizontal and vertical components (A)</p> Signup and view all the answers

What is the method used to add vectors in two dimensions when they are not perpendicular?

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

What is the unit of force in the International System of Units (SI)?

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

What is the resultant force?

<p>The sum of all the forces acting on an object (B)</p> Signup and view all the answers

What is the purpose of using bearings to specify vector directions?

<p>To provide a numerical way to specify directions (A)</p> Signup and view all the answers

What is the primary application of electromagnetic induction?

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

What is the significance of the resultant vector?

<p>It represents the combined effect of multiple vectors acting simultaneously (C)</p> Signup and view all the answers

What is the normal force?

<p>The force perpendicular to the surface (A)</p> Signup and view all the answers

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

<p>Opposes the change in magnetic flux (B)</p> Signup and view all the answers

What is the difference between static and kinetic friction?

<p>Static friction occurs when an object is not moving, while kinetic friction occurs when an object is moving (C)</p> Signup and view all the answers

What is the relationship between the magnitude of the resultant vector and the components of the vectors?

<p>R = √(Rx^2 + Ry^2) (C)</p> Signup and view all the answers

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

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

What is the direction of the resultant vector?

<p>Dependent on the components (D)</p> Signup and view all the answers

What is the purpose of trigonometric identities in resolving vectors?

<p>To find the components of the vector (A)</p> Signup and view all the answers

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

<p>Constant resistance at constant temperature (A)</p> Signup and view all the answers

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

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

What is a contact force?

<p>A force that touches the object (C)</p> Signup and view all the answers

What is the purpose of finding the resultant vector?

<p>To predict the motion of an object (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 (B)</p> Signup and view all the answers

What is a non-contact force?

<p>A force that does not touch the object (B)</p> Signup and view all the answers

What is the characteristic of a non-ohmic conductor?

<p>Resistance changes with temperature (B)</p> Signup and view all the answers

What is the formula for the total resistance in a parallel circuit?

<p>1/Rp = 1/R1 + 1/R2 + 1/R3 + … + 1/Rn (C)</p> Signup and view all the answers

What is the current in a series circuit?

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

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

<p>The same across all resistors (D)</p> Signup and view all the answers

What is the coefficient of friction?

<p>A constant for a given pair of surfaces that can vary with speed (C)</p> Signup and view all the answers

What is the purpose of a force diagram?

<p>To show the direction of the forces acting on an object (D)</p> Signup and view all the answers

What is the formula for the static frictional force?

<p>f_s = μ_s N (B)</p> Signup and view all the answers

What is the purpose of resolving forces into components?

<p>To simplify calculations involving inclined planes (A)</p> Signup and view all the answers

What is the formula for the kinetic frictional force?

<p>f_k = μ_k N (C)</p> Signup and view all the answers

What is the definition of Newton's First Law of Motion?

<p>An object continues in a state of rest or uniform motion unless acted on by an unbalanced force (D)</p> Signup and view all the answers

What is the formula for the resultant force?

<p>R = sqrt(F_x^2 + F_y^2) (D)</p> Signup and view all the answers

What is the definition of inertia?

<p>The property of an object to continue in its current state of motion unless acted on by an external force (B)</p> Signup and view all the answers

What happens to the apparent weight of an object when it is accelerating upwards?

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

What is the direction of the force of gravity on an object on an inclined plane?

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

What is the relationship between weight and mass?

<p>F_g = mg (C)</p> Signup and view all the answers

When does weightlessness occur?

<p>When there is no normal force acting on an object (B)</p> Signup and view all the answers

What is the purpose of comparative problems in physics?

<p>To calculate a quantity in terms of another known quantity (A)</p> Signup and view all the answers

What is the situation in which astronauts in space experience weightlessness?

<p>When they are in continuous free fall around the Earth (B)</p> Signup and view all the answers

What is the method for solving comparative problems in physics?

<p>Write out equations and calculate all quantities for the given situation (C)</p> Signup and view all the answers

What is the definition of Newton's Third Law of Motion?

<p>For every action, there is an equal and opposite reaction. (B)</p> Signup and view all the answers

What is the definition of an object in equilibrium?

<p>An object with both the sum of the forces acting on it and the resultant force equal to zero. (B)</p> Signup and view all the answers

What is the resultant force of an object in equilibrium?

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

What is the frictional force that opposes the motion of an object in contact with a surface?

<p>Frictional force. (C)</p> Signup and view all the answers

What is the force exerted by a surface to support the weight of an object resting on it?

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

What is the net force acting on an object moving with constant velocity?

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

What is the force of gravity acting on an object?

<p>F = mg. (B)</p> Signup and view all the answers

What is the gravitational acceleration near the surface of the Earth?

<p>9.8 m/s^2. (C)</p> Signup and view all the answers

What is the difference between mass and weight?

<p>Mass is the amount of matter in an object, weight is the force of gravity acting on it. (B)</p> Signup and view all the answers

What is the formula for the gravitational force between two objects?

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

What is the effect of decreasing the distance between two point-like charges on the electrostatic force between them?

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

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

<p>The electrostatic force is directly proportional to the product of the charges (B)</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 are inverse-square laws (D)</p> Signup and view all the answers

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

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

What is the effect of increasing the magnitude of one of the charges on the electrostatic force between two point-like charges?

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

What is the physical phenomenon that Coulomb's law describes?

<p>Electrostatic force between two point-like charges (A)</p> Signup and view all the answers

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

<p>It shows that 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 physical quantity that is represented by the symbol Q in Coulomb's law?

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

What is the primary purpose of electromagnets?

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

What is the impact of power lines on the environment?

<p>Power lines can cause bird fatalities (A)</p> Signup and view all the answers

What is the frequency of magnetic fields generated by power lines?

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

What is the formula for magnetic flux through a loop of area A in the presence of a uniform magnetic field B?

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

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

<p>The current flows in the opposite direction of the approaching south pole (C)</p> Signup and view all the answers

What is Faraday's Law of Electromagnetic Induction?

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

What is the unit of magnetic flux?

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

What happens to the magnetic field strength when a magnet is moved near a wire?

<p>The magnetic field strength increases (A)</p> Signup and view all the answers

What is the purpose of the Right Hand Rule in electromagnetic induction?

<p>To determine the direction of the induced current (A)</p> Signup and view all the answers

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

<p>No voltage is generated across the wire (D)</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 (B)</p> Signup and view all the answers

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

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

What is the relationship between current, voltage, and resistance in a circuit?

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

What is the characteristic of ohmic conductors?

<p>Resistance is constant at constant temperature (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 (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 parallel path (D)</p> Signup and view all the answers

What is the effect of increasing the temperature of a conductor on its resistance?

<p>Resistance changes depending on the type of conductor (B)</p> Signup and view all the answers

What is the characteristic of non-ohmic conductors?

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

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

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

What is the purpose of analyzing circuits with resistors in series or parallel?

<p>To design the most efficient circuit possible (C)</p> Signup and view all the answers

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

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

What is the unit of electric field strength?

<p>Newtons per coulomb (B)</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 wire (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 effect of increasing the current in a wire on the magnetic field strength?

<p>It increases the magnetic field strength (D)</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 (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>⊙ (A)</p> Signup and view all the answers

What is the region where the magnetic field lines are denser?

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

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

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

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

<p>Perpendicular to the loop (B)</p> Signup and view all the answers

What is the direction of the electric field at a point around a positive charge?

<p>Away from the charge (C)</p> Signup and view all the answers

What do electric field lines show?

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

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

<p>They repel from both charges (B)</p> Signup and view all the answers

What is the effect of charges of different magnitudes on the electric field?

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

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

<p>The electrostatic force increases (A)</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 direction of electric field lines around a negative charge?

<p>Towards the charge (D)</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 distance (D)</p> Signup and view all the answers

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

<p>They describe forces that follow an inverse-square relationship (D)</p> Signup and view all the answers

What is the purpose of drawing electric field lines?

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

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

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

What happens to the force experienced by a test charge as the distance from the source charge increases?

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

What is the significance of the inverse-square relationship in physics?

<p>It describes the decrease in force with distance (B)</p> Signup and view all the answers

What is the relationship between the electric field lines and the force experienced by a test charge?

<p>The electric field lines show the direction of the force (C)</p> Signup and view all the answers

What is the definition of an electric field?

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

What is the significance of drawing electric field lines continuously?

<p>To show the continuous nature of the electric field (B)</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 a positive test charge would experience (C)</p> Signup and view all the answers

What is the significance of Coulomb's law?

<p>It describes the electrostatic force between two point-like charges (B)</p> Signup and view all the answers

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

<p>The electrostatic force decreases rapidly with distance (B)</p> Signup and view all the answers

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

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

What is the formula for calculating electrical energy?

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

What is the unit of measurement for electrical energy in household and commercial contexts?

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

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

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

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

<p>P = I^2 · R (A)</p> Signup and view all the answers

What is the formula for calculating power when the voltage across the circuit element and its resistance are known?

<p>P = V^2 / R (C)</p> Signup and view all the answers

What is the purpose of a battery in a circuit?

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

What is the total resistance of a circuit with two parallel portions that are then in series with a cell?

<p>The sum of the resistances of the parallel portions and the cell (A)</p> Signup and view all the answers

What is the relationship between weight and mass?

<p>F_g = m * g (A)</p> Signup and view all the answers

When do objects experience weightlessness?

<p>When they are in free fall or orbit (C)</p> Signup and view all the answers

What is the purpose of solving comparative problems?

<p>To analyze and predict the gravitational interactions between objects (C)</p> Signup and view all the answers

What is the first step in solving a comparative problem?

<p>Write out the equations and calculate all quantities for the given situation (D)</p> Signup and view all the answers

What is the final step in solving a comparative problem?

<p>Write the second case in terms of the first case (B)</p> Signup and view all the answers

What is the main purpose of resolving a vector into its components?

<p>To find the horizontal and vertical components of the vector (C)</p> Signup and view all the answers

What is the unit of force in the International System of Units (SI)?

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

What is the normal force exerted by a surface on an object?

<p>A force that balances the gravitational force (D)</p> Signup and view all the answers

What is the type of friction that opposes motion when an object is not moving?

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

What is the result of combining multiple vectors into a single vector?

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

What is the angle measured in resolving a vector into its components?

<p>The angle measured counter-clockwise from the positive x-axis (B)</p> Signup and view all the answers

What is the purpose of using trigonometric identities in resolving vectors into components?

<p>To find the horizontal and vertical components of the vector (B)</p> Signup and view all the answers

What is the type of force that does not have to touch an object to cause a change?

<p>Non-contact force (B)</p> Signup and view all the answers

What is the result of adding multiple forces acting on an object?

<p>A resultant force (C)</p> Signup and view all the answers

What is the direction of the frictional force on an object in contact with a surface?

<p>Parallel to the surface (D)</p> Signup and view all the answers

What is the coefficient of friction?

<p>A constant for a given surface (B)</p> Signup and view all the answers

What is the purpose of a force diagram?

<p>To show the forces acting on a system (C)</p> Signup and view all the answers

What is the normal force?

<p>The force that balances the component of the gravitational force perpendicular to the slope (B)</p> Signup and view all the answers

What is the formula for the static frictional force?

<p>fmax,s = μsN (D)</p> Signup and view all the answers

What is the formula for the kinetic frictional force?

<p>fk = μkN (B)</p> Signup and view all the answers

What is the purpose of resolving forces into components?

<p>To simplify calculations, particularly in problems involving inclined planes (B)</p> Signup and view all the answers

What is the definition of Newton's First Law of Motion?

<p>An object continues in a state of rest or uniform motion unless it is acted on by an unbalanced force (A)</p> Signup and view all the answers

What is the formula for Newton's Second Law of Motion?

<p>Fnet = ma (A)</p> Signup and view all the answers

What happens to the apparent weight when a lift accelerates upwards?

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

What is the direction of the acceleration of an object on an inclined plane?

<p>Down the slope (C)</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 (A)</p> Signup and view all the answers

What is the purpose of vector equality in the Cartesian plane?

<p>To ensure the magnitude and direction of a vector remain unchanged (D)</p> Signup and view all the answers

How are perpendicular vectors typically represented in the Cartesian plane?

<p>At a right angle (A)</p> Signup and view all the answers

What is the formula to calculate the magnitude of the resultant vector using Pythagoras’ theorem?

<p>R = √(Rx^2 + Ry^2) (A)</p> Signup and view all the answers

What is the graphical method used to add vectors in two dimensions?

<p>Tail-to-head method (A)</p> Signup and view all the answers

What is a closed vector diagram used to represent?

<p>A resultant vector with zero magnitude (D)</p> Signup and view all the answers

What is the significance of compass directions in vector representation?

<p>To specify the direction of a vector (A)</p> Signup and view all the answers

What is the purpose of bearings in vector representation?

<p>To provide a numerical way to specify directions (D)</p> Signup and view all the answers

What is the result of adding vectors in two dimensions using the same principles as in one dimension?

<p>The resultant vector represents the combined effect of multiple vectors (A)</p> Signup and view all the answers

What is the importance of understanding the principles of electrical power and energy?

<p>It aids in designing and managing electrical circuits efficiently (D)</p> Signup and view all the answers

What is the definition of Newton's Third Law of Motion?

<p>For every action, there is an equal and opposite reaction. (A)</p> Signup and view all the answers

What is the resultant force?

<p>The vector sum of all the forces acting on an object. (C)</p> Signup and view all the answers

What is the coefficient of friction?

<p>A constant that depends on the normal force and the surface type. (B)</p> Signup and view all the answers

What is the purpose of a free body diagram?

<p>To show the forces acting on an object and their directions. (D)</p> Signup and view all the answers

What is the gravitational force between two objects?

<p>A force that is proportional to the product of the masses and inversely proportional to the square of the distance between them. (C)</p> Signup and view all the answers

What is the relationship between the weight of an object and its mass?

<p>The weight of an object is proportional to its mass. (B)</p> Signup and view all the answers

What is the gravitational acceleration near the surface of the Earth?

<p>9.8 m/s² (C)</p> Signup and view all the answers

What is the difference between mass and weight?

<p>Mass is a property of an object, while weight is a force acting on an object. (D)</p> Signup and view all the answers

What is the purpose of resolving forces into components?

<p>To resolve the forces acting on an object into parallel and perpendicular components. (A)</p> Signup and view all the answers

What is the force of friction that prevents relative motion between surfaces?

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

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