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In an ac circult , the instantaneous...

In an ac circult , the instantaneous emf and current are given by ` e= 100 sin 30 t : t= 20 sin ( 30 t-(pi)/(4))`.
in one cycle of ac , the average power consumed by the circult and the wattless current are respectively

A

`(50 ) /( sqrt 2),0`

B

`50,0`

C

` 50 ,10`

D

`(1000 ) /( sqrt( 2)),10 `

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