For high frequencies, capacitor acts as ________

A)
Amplifier
B)
Rectifier
C)
Short circuit
D)
Open circuit

Correct Answer : Option (C) :   Short circuit

Explanation : Capacitive impedance is inversely proportional to frequency. Hence at very high frequencies, the impedance is almost equal to zero, hence it acts as a short circuit and there is no voltage across 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

EEE MCQ's

Capacitors
RC Circuits
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Ohm's Law
Energy and Power
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