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The average power dissipated in A.C. cir...

The average power dissipated in A.C. circuit is 2 watt. If a current flowing through a circuit is 2 A and impedance is `1 Omega`, what is the power factor of the A.C. circuit ?

A

0.5

B

20 V

C

2 V

D

0.2 V.

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