For very low frequencies, capacitor acts as ______

Electrical and Electronic Engineering (EEE) : Capacitors - Quiz(MCQ)

Open circuit

Rectifier

Amplifier

Short circuit

Correct Answer : Option (A) : Open circuit

Explanation : Capacitive impedance is inversely proportional to frequency. Hence at very low frequencies the impedance is almost infinity and hence acts as an open circuit and no current flows through it.

Recently Updated in Capacitors Questions

A 0.00022 F capacitor equals how many micro-farads?

22 ÂµF

220 ÂµF

2,200 ÂµF

22,200 ÂµF

Correct Answer : 220 ÂµF

Two series capacitors (one 2 µF, the other of unknown value) are charged from a 24 V source. The 2 µF capacitor is charged to 16 V and the other to 8 V. The value of the unknown capacitor is

1 µF

2 µF

4 µF

8 µF

Correct Answer : 4 µF

XC is inversely proportional to frequency and capacitance.

True

False

Correct Answer : True