the power consumed, Physics

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

Ans) P=V*I
I will be same in both cases
so
P1=V1*I
P2=V2*I
Dividing both equations,
P1/P2=V1/V2
100/P2=220/110
P2=50 (Ans)

Posted Date: 3/21/2013 12:47:45 AM | Location : United States







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