For very low frequencies, capacitor acts as ______

A)
Open circuit
B)
Rectifier
C)
Amplifier
D)
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?
A)
22 µF
B)
220 µF
C)
2,200 µF
D)
22,200 µF

Correct Answer :   220 µF

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
A)
1 µF
B)
2 µF
C)
4 µF
D)
8 µF

Correct Answer :   4 µF

XC is inversely proportional to frequency and capacitance.
A)
True
B)
False
C)
--
D)
--

Correct Answer :   True

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RC Circuits
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Ohm's Law
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