1.

In an `AC` circuit, the current is given by `i=5sin(100t-(pi)/2)` and the `AC` potential is `V=200sin(100)`volt. Then the power consumption isA. `20` wattB. `40` wattC. `1000` wattD. `0` watt

Answer» Correct Answer - D
`P=Vi cos varphi`
Phase difference `phi=(pi)/2 implies P=zero`


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