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Van de Graaff Generator and Capacitor Energy Quiz

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Van de Graaff Generator and Capacitor Energy Quiz

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Questions and Answers

In the electric field surrounding a group of charged particles, field strength is greater where field lines are:

Thickest (correct)

Farthest apart

Closest

Longest

How can the voltage of a Van de Graaff generator be increased?

By increasing the radius of the sphere or using high pressure gas (correct)

Decreasing the radius of the sphere

Submerging the generator in water

Using low-pressure gas

Electrons on the surface of a conductor will arrange themselves to:

Follow the inverse-square law

Tend toward a state of minimum energy

Cancel the electric field inside to zero (correct)

Be shielded from external charges

What does the potential energy of a compressed spring and the potential energy of a charged object depend on?

Only on the work done on them Signup and view all the answers

An electric field has:

Both magnitude and direction Signup and view all the answers

Where is the field strength greater in the electric field surrounding charged particles?

Where field lines are thickest Signup and view all the answers

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

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

Can a capacitor store charge?

It can store energy and charge. Signup and view all the answers

What happens to the electric field inside a conductor as it charges?

Nothing; the field is always zero. Signup and view all the answers

In a Van de Graaff generator, what happens to the electric field inside the conducting sphere as it charges?

Nothing; the field is always zero. Signup and view all the answers

How is the electric potential related to the kinetic and potential energies of charged particles?

When their kinetic energies exceed potential energies. Signup and view all the answers

What is the purpose of placing the Van de Graaff generator in a container filled with high-pressure gas?

To increase the voltage of the generator Signup and view all the answers

What happens to the electrons carried up into the hollow metal sphere of the Van de Graaff generator?

They move to the outer surface of the sphere Signup and view all the answers

How does mutual repulsion affect the distribution of electrons in a Van de Graaff generator?

Moves electrons to the outer surface of the conducting sphere Signup and view all the answers

What is the function of the rubber belt in a Van de Graaff generator?

To carry electrons from the voltage source to a conducting sphere Signup and view all the answers

How does a Van de Graaff generator demonstrate shielding of electric fields?

By preventing electric charges from accumulating on its surface Signup and view all the answers

What is the purpose of using thin metallic foils separated by a thin sheet of paper in a Van de Graaff generator?

To provide insulation between conducting plates Signup and view all the answers