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Electric Potential and Capacitors Quiz

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Questions and Answers

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

They are different names for the same concept

Both are measured using the units of coulomb

Both are measured using only the units of joules

Electric potential is the ratio of electrical potential energy per charge (correct)

Can a capacitor store both energy and charge?

It cannot store energy

It cannot store charge

Can only store energy

Can store energy and charge (correct)

What happens to the electric field inside a conducting sphere of a Van de Graaff generator as it charges?

The field increases in magnitude as the amount of charge increases

The field decreases in magnitude as the amount of charge increases

Nothing; the field is always zero (correct)

The field will have a net force of one

When does an electric field shield inside a conductor?

When the conductor has a non-uniform charge distribution Signup and view all the answers

How does a change in polarity affect the electric potential energy of a system?

No effect on the electric potential energy Signup and view all the answers

What is the SI unit of measurement for electric potential?

Volt Signup and view all the answers

How is potential energy measured?

Joules Signup and view all the answers

What does a potential of 1 volt represent?

1 joule of energy per coulomb of charge Signup and view all the answers

Why is it said that a potential of 1000 V means that 1000 joules of energy per coulomb is needed to bring a small charge from very far away and add it to the charge on the conductor?

To emphasize the relationship between voltage and energy per charge Signup and view all the answers

If there were twice as much charge on an object, what would happen to its electrical potential energy?

It would be twice as great Signup and view all the answers

What would happen to the electric potential if twice as much charge was present on an object?

It would remain the same Signup and view all the answers

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

Electric potential energy Signup and view all the answers

When pushing a positive test charge closer to a positively charged sphere, what type of energy is overcome?

Electrical repulsion Signup and view all the answers

What is the term used to describe the electrical potential energy per charge?

Electric potential Signup and view all the answers

Why is it mentioned that the electric potential of any charge at the same location is the same?

To highlight equipotential surfaces Signup and view all the answers

When rubbing a balloon on hair, what causes the balloon to become negatively charged?

Absorption of electrons by the balloon Signup and view all the answers

What can be said about the electrical potential energy of an object with greater charge compared to an object with less charge within an electric field?

It remains the same as electric potential does not depend on charge amount Signup and view all the answers