1.

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 isA. 1000 WB. 40 WC. 20 WD. 0 W

Answer» Correct Answer - 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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