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</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</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</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</p> Signup and view all the answers

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

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

    What do electric field lines show?

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

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

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

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

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

    What do arrows on electric field lines indicate?

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

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

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

    What is the unit of electric field strength?

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

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

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

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

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

    What is the formula for electric field strength?

    <p>E = F/q</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>⊙</p> Signup and view all the answers

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

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

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

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

    What is the unit of magnetic flux?

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

    What is the unit of measurement for power?

    <p>Watts</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</p> Signup and view all the answers

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

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

    What is the formula for calculating electrical energy?

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

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

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

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

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

    How do you convert power from watts to kilowatts?

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

    What is the formula for calculating the cost of electricity?

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

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

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

    What is the result of vectors that are perpendicular?

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

    What is the relationship between weight and mass?

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

    What is the definition of electrical current?

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

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

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

    What type of force is the normal force?

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

    What is the direction of the resultant force?

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

    What is the definition of a force?

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

    What is the nature of force?

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

    What is the purpose of using components in vector addition?

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

    What is the coefficient of friction dependent on?

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

    What is the direction of the kinetic frictional force?

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

    What is the normal force dependent on?

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

    What is the purpose of resolving forces into components?

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

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

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

    What is the effect of acceleration on apparent weight?

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

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

    <p>Outwards</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.</p> Signup and view all the answers

    What is the resultant force?

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

    What is the frictional force?

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

    What is the coefficient of friction?

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

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

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

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

    <p>N·m²/C²</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.</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.</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.</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.</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.</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.</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.</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.</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.</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.</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.</p> Signup and view all the answers

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

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

    What do electric field lines show?

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

    What is the unit of electric field strength?

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

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

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

    What is the formula for electric field strength?

    <p>E = F/q</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</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>⊙</p> Signup and view all the answers

    What do arrows on electric field lines indicate?

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

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

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

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

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

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

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

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

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

    What is the advantage of electromagnets over permanent magnets?

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

    What is the main purpose of electromagnets?

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

    What is the unit of magnetic flux?

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

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

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

    What is the principle behind electrical generators?

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

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

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

    What is the characteristic of ohmic conductors?

    <p>Their resistance is constant at a constant temperature</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</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</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</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</p> Signup and view all the answers

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

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

    What is the relationship between weight and mass?

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

    When does an object experience weightlessness?

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

    What is the experience of astronauts in space?

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

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

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

    What is the unit of measurement for electrical energy?

    <p>Joules</p> Signup and view all the answers

    What is the formula for electrical energy?

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

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

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

    What is the unit of measurement for power?

    <p>Watts</p> Signup and view all the answers

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

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

    What is the direction of the frictional force?

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

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

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

    What is the coefficient of friction?

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

    What is the formula for the static frictional force?

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

    What is the purpose of resolving forces into components?

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

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

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

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

    <p>Newton</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</p> Signup and view all the answers

    What is the resultant force?

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

    What are the two types of friction?

    <p>Static and kinetic friction</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</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</p> Signup and view all the answers

    What is the normal force?

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

    What is the resultant vector in two dimensions?

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

    What is the coefficient of friction?

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

    What is the static frictional force given by?

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

    What is the purpose of drawing force diagrams?

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

    What is the use of resolving forces into components?

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

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

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

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

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

    What is the unit of electric field strength?

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

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

    <p>Concentric circles</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</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>⊙</p> Signup and view all the answers

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

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

    What is the purpose of an electromagnet?

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

    What is the formula for electric field strength?

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

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

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

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

    <p>P = I ⋅ V</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</p> Signup and view all the answers

    What is the unit of measurement for electrical energy?

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

    What is the formula for calculating electrical energy?

    <p>E = P ⋅ t</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</p> Signup and view all the answers

    What is the unit of measurement for power?

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

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

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

    What is the unit of magnetic flux?

    <p>Weber</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</p> Signup and view all the answers

    What do electric field lines show?

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

    What is the relationship between electrical energy and time?

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

    What do arrows on electric field lines indicate?

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

    What is the significance of drawing electric field lines?

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

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

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

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

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

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

    <p>Newton</p> Signup and view all the answers

    What is the resultant force?

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

    What is the primary application of electromagnetic induction?

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

    What is the normal force?

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

    What is the direction of the resultant vector?

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

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

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

    What is a contact force?

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

    What is the purpose of finding the resultant vector?

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

    What is a non-contact force?

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

    What is the characteristic of a non-ohmic conductor?

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

    What is the current in a series circuit?

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

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

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

    What is the formula for the static frictional force?

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

    What is the purpose of resolving forces into components?

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

    What is the formula for the kinetic frictional force?

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

    What is the formula for the resultant force?

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

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

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

    What is the relationship between weight and mass?

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

    When does weightlessness occur?

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

    What is the resultant force of an object in equilibrium?

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

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

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

    What is the force of gravity acting on an object?

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

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

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

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

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

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

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

    What is the primary purpose of electromagnets?

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

    What is the impact of power lines on the environment?

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

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

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

    What is the unit of magnetic flux?

    <p>Weber</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</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</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</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</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</p> Signup and view all the answers

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

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

    What is the characteristic of ohmic conductors?

    <p>Resistance is constant at constant temperature</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</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</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</p> Signup and view all the answers

    What is the characteristic of non-ohmic conductors?

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

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

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

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

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

    What is the unit of electric field strength?

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

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

    <p>Concentric circles</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</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</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>⊙</p> Signup and view all the answers

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

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

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

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

    What do electric field lines show?

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

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

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

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

    <p>P = I · V</p> Signup and view all the answers

    What is the unit of measurement for power?

    <p>Watt</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</p> Signup and view all the answers

    What is the formula for calculating electrical energy?

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

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

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

    What is the relationship between weight and mass?

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

    When do objects experience weightlessness?

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

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

    <p>Newton</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</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</p> Signup and view all the answers

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

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

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

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

    What is the coefficient of friction?

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

    What is the purpose of a force diagram?

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

    What is the formula for the static frictional force?

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

    What is the formula for the kinetic frictional force?

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

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

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

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

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

    How are perpendicular vectors typically represented in the Cartesian plane?

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

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

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

    What is a closed vector diagram used to represent?

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

    What is the resultant force?

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

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

    <p>9.8 m/s²</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.</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.</p> Signup and view all the answers

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

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

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