The power dissipated in a pure capacitor is __.

Q. The power dissipated in a pure capacitor is __.

A

Zero

B

Unity

C

Proportional to the applied voltage

D

Proportional to the value of capacitance

Solution:

Purely inductive or capacitive circuit:

Phase difference between Voltage and current is p/2. So cos p/2 = 0.
Hence no power dissipated even though current is flowing in the circuit.
This current is known as wattless current.

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