1.

An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be-

Answer»

<P>100 W
75 W
50 W
25 W

Solution :`P=V^(2)/RtoR=V^(2)/P=(220xx220)/100=484Omega`
`P=V^(2)/R=(110xx110)/484=25W`.


Discussion

No Comment Found