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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