Capacitors MCQs

Question 1

For a given charge difference, electrostatic field strength varies according to:

Accepted Answer

plate area

Answer

plate differential

Answer

plate distance

Answer

dielectric quantity

Question 2

A capacitor has 25 V across its plates and a stored charge of 1500 mu.gifC. What is the capacitance value?

Accepted Answer

60 mu.gifF

Answer

60 pF

Answer

16.67 mF

Answer

37.5 mF

Question 3

A capacitor and an output resistor form a series circuit with a square wave applied. The circuit is:

Accepted Answer

a differentiator

Answer

an integrator

Answer

a multiplier

Answer

a divider

Question 4

Capacitive reactance values connected in series offer

Accepted Answer

an increase in total XC

Answer

a decrease in total XC

Answer

no change in total XC

Answer

total opposition to voltage in the circuit

Question 5

The quantity that represents an ideal capacitor dissipating 0 W of power is

Accepted Answer

true power

Answer

instantaneous power

Answer

reactive power

Answer

resistive power

Question 6

If a capacitor is placed across a 20 V source, what will be the amount of charge after 5 tc?

Accepted Answer

20 V

Answer

5.0 V

Answer

12.8 V

Answer

13.5 V

Question 7

What is the impedance of an ac RC parallel circuit if the resistance is 12 ohms and the capacitive reactance equals 5 ohms?

Accepted Answer

4.6 ohms

Answer

0.2 ohms

Answer

3.5 ohms

Answer

13 ohms

Question 8

What will a 1 F capacitor store?

Accepted Answer

6.24 x 1012 electrons

Answer

one coulomb of charge

Answer

one volt

Answer

one A of current

Question 9

What is the power factor if the apparent power of a circuit is 5 W, while the true power is 4 W?

Accepted Answer

0.8 W

Answer

0.0 W

Answer

1.0 W

Answer

1.25 W