dielectric, Capacitance Quiz

What is a dielectric material?

• A conducting material that can be polarized by an electric field.

• A material that allows electric current to flow through it easily.

• A material that does not respond to an electric field.

• An insulating material that can be polarized by an electric field.

What is the formula for capacitance?

• C = V/Q

• C = Q/V

• C = Q/A

• C = I/V

How is capacitance calculated?

• By adding the charge stored on one plate of a capacitor to the potential difference between the plates.

• By subtracting the charge stored on one plate of a capacitor from the potential difference between the plates.

• By dividing the charge stored on one plate of a capacitor by the potential difference between the plates.

• By multiplying the charge stored on one plate of a capacitor by the potential difference between the plates.

What is the purpose of a dielectric material in a capacitor?

• To decrease capacitance

• To store energy

• To reduce voltage

• To increase capacitance

What are the units of capacitance?

• farads

• watts

• ohms

• volts

How does the presence of a dielectric material affect the capacitance of a capacitor?

• increases

• reverses

• has no effect

• decreases

What is the capacitance of a parallel plate capacitor with a dielectric material between the plates?

• C = εA/d^4

• C = εA/d^2

• C = εA/d^3

• C = kεA/d

How does the distance between the plates of a capacitor affect its capacitance?

• The capacitance remains constant regardless of the distance between the plates.

• The capacitance increases as the distance between the plates increases.

• The distance between the plates has no effect on the capacitance.

• The capacitance decreases as the distance between the plates increases.