Electric Potential Energy and Work in Physics
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Questions and Answers

What do electric field lines represent?

  • Magnitude of the electric field (correct)
  • Speed of the charges
  • Distance between charges
  • Charge of the conductor

    • What happens to electric field lines around an isolated charge?

  • They curve around the charge
  • They extend to infinity (correct)
  • They disappear close to the charge
  • They terminate on a positive charge

    • How are the field lines distributed between two oppositely charged capacitor plates?

  • Absent near the plates
  • Evenly spaced (correct)
  • Closer on one side
  • Concentrated near the center

    • What do oppositely charged parallel plates produce between them?

    <p>Nearly parallel field lines</p> Signup and view all the answers

    What does a charged cylinder do to the electric field inside it?

    <p>Eliminates the field inside</p> Signup and view all the answers

    What is indicated by the length of vectors in a vector representation of an electric field?

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

    What is the name of the energy a charge has due to its location in an electric field?

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

    Which term describes the total electrical potential energy divided by the amount of charge?

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

    What is the work done in pushing a charge against an electric field equal to?

    <p>Energy gained by the charge</p> Signup and view all the answers

    How does the electrical potential vary with the amount of charge at the same location in an electric field?

    <p>Has no relation to the charge</p> Signup and view all the answers

    When a balloon is rubbed on hair and becomes negatively charged, what happens to its energy?

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

    What remains the same for charges of different magnitudes at the same location in an electric field?

    <p>Electrical potential energy per charge</p> Signup and view all the answers

    How is the magnitude of an electric field measured?

    <p>By observing the force on a positive test charge placed in the field</p> Signup and view all the answers

    What does the direction of an electric field indicate?

    <p>The type of charge that set up the field</p> Signup and view all the answers

    How can an electric field be represented visually?

    <p>By drawing vectors called electric field lines</p> Signup and view all the answers

    When are electric field lines closer together?

    <p>In regions where the field is stronger</p> Signup and view all the answers

    What does the length of vectors representing an electric field indicate?

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

    Where do vectors point in relation to a negatively charged particle?

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

    What is the relationship between electric potential and electrical potential energy?

    <p>Electric potential is the ratio of electrical potential energy per charge.</p> Signup and view all the answers

    Can a capacitor store both energy and charge?

    <p>It can store energy and charge.</p> Signup and view all the answers

    What is the SI unit of measurement for electric potential?

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

    How is the electric field inside the conducting sphere of a Van de Graaff generator affected as it charges?

    <p>The field increases in magnitude as the amount of charge increases.</p> Signup and view all the answers

    What primarily determines the potential energy of a charged particle in an electric field?

    <p>The charge of the particle and the distance between charges.</p> Signup and view all the answers

    How is potential energy measured?

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

    Under what conditions would a charged particle have its kinetic energies exceeding its potential energies?

    <p>When moving at high speeds.</p> Signup and view all the answers

    What does a potential of 1 volt represent?

    <p>1 joule of energy per coulomb of charge</p> Signup and view all the answers

    If there were twice as much charge on one of the objects, what would happen to the electrical potential energy?

    <p>It would be twice as much</p> Signup and view all the answers

    What is commonly called voltage?

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

    What happens to the electric potential if twice as much charge is added to an object?

    <p>It remains the same</p> Signup and view all the answers

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