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In an A.C. circuit I=10 cos(100 t) amper...

In an A.C. circuit I=10 cos(100 t) ampere and `V=20 sin(100t). The power loss in the circuit will be

A

20 watt

B

200 watt

C

0 watt

D

50 watt

Text Solution

Verified by Experts

The correct Answer is:
C
`I = 10 cos (100 t) = 10 sin (100t+(pi)/2)`
There is a phase diff. Of `(pi)/2` between I and V.
`:.` Power factor = `cos theta =0 :.` Power less =0.
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MARVEL PUBLICATION-ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS -TEST YOUR GRASP - 16
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