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In an AC circuit, the current is given b...

In an `AC` circuit, the current is given by `i=5sin(100t-(pi)/2)` and the `AC` potential is `V=200sin(100t)`volt. Then the power consumption is

A

1000 W

B

40 W

C

20 W

D

0 W

Text Solution

Verified by Experts

The correct Answer is:
D
In the given problem emf leads the current by `90^(@)`.
Thus, `overline(P)=e_(rms)I_(rms)cosphi=e_(rms)I_(rms)cos90=0`
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