Electric Energy Storage - Quiz Quiz

Question 1

The plates on a vacuum capacitor have a radius of 2 point 5 millimeters and are separated by a distance of 0 point 7 5 millimeters What is the capacitance of this capacitor?

Revolt · Accepted Answer

A: 2 point 3 times 10 to the negative 13 power cap f

Question 2

The plates on a capacitor have a radius of 1 point 5 millimeters and are separated by a distance of 0 point 4 3 millimeters The space between the plates is filled with a dielectric that has a dielectric constant of 3 point 8 What is the capacitance of this capacitor?

Revolt · Accepted Answer

B: 5 point 5 times 10 to the negative 13 power cap f

Question 3

Why are the plates in a capacitor parallel to each other?

Revolt · Accepted Answer

C: to form a uniform electric field between the plates

Question 4

What is the amount of charge a capacitor can store per volt of potential difference?

Revolt · Accepted Answer

C: capacitance

Question 5

A capacitor is connected to a power source and begins charging. What causes the capacitor to stop charging while it is still connected to the power source?

Revolt · Accepted Answer

A: Electrons are too strongly repelled from the negatively charged plate.

Question 6

What is the SI unit for capacitance?

Revolt · Accepted Answer

B: farad (F)

Question 7

A power source of 6 point 0 cap v is attached to the ends of a capacitor. The charge is 12 µC What is the capacitance for this capacitor?

Revolt · Accepted Answer

A: 2 point 0 µF

Question 8

Rami uses a disposable camera that has a flash. When he wants to take a picture, he holds a button and hears a rising whining sound. When a small light glows, the flash is ready. He presses the shutter button, the flash lights up, and he takes his picture. Which statement best describes how a capacitor is useful in the camera?

Revolt · Accepted Answer

B: It stores energy and delivers it in a short burst.; C: It stores energy and delivers it in a steady current.

Question 9

How is capacitance related to the distance between the plates of a capacitor?

Revolt · Accepted Answer

A: It is inversely proportional, so the capacitance decreases as the distance increases.

Question 10

What is the measure of a specific material’s ability to insulate charges from each other?

Revolt · Accepted Answer

D: permittivity

Electric Energy Storage - Quiz Quiz Answers

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