Capacitors MCQs

Question 1

What is the dielectric constant for ceramic?

Accepted Answer

between 6 and 8000

Answer

5.0

Answer

between 5 and 1000

Answer

3000

Question 2

What is the voltage across a capacitor after being charged from a 100 V source for a period of one time constant?

Accepted Answer

63 V

Answer

37.8 V

Answer

38 V

Answer

101 V

Question 3

Power stored from the source and then returned to the source is called:

Accepted Answer

reactive power

Answer

apparent power

Answer

impedance power

Answer

true power

Question 4

Capacitor value markings are usually:

Accepted Answer

alphanumeric

Answer

color dabs

Answer

standard

Answer

white print

Question 5

A source voltage across a capacitor will:

Accepted Answer

lag the current by 90 degrees

Answer

lead the current by 90 degrees

Answer

lead the current by 180 degrees

Answer

lag the current by 180 degrees

Question 6

An 8 V power source is charging a capacitor. How many volts will be across the capacitor at the second time constant?

Accepted Answer

7 volts

Answer

1 volt

Answer

3 volts

Answer

5 volts

Question 7

The material used between the plates of a capacitor is called its:

Accepted Answer

dielectric material

Answer

insulation material

Answer

separation material

Answer

plate-divider material

Question 8

When a circuit consists of a capacitor and a resistor in series with a voltage source, and the voltage across the resistor is zero, then the capacitor is:

Accepted Answer

fully charged

Answer

charging

Answer

discharging

Answer

fully discharged

Question 9

Which material has the highest dielectric strength?

Accepted Answer

Mica

Answer

Air

Answer

Paper

Answer

Oil