Question

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

Answer 1

Hi friend ,

P = V^2/R  

If V = 220 V we have

100 W = 220^2/R

R = 220^2/100 Ω = 484 Ω. This is the resistance of the bulb.

When V = 110 V, power consumed =  V^2/R = 110^2/484 = 25 W.

So, 25 W power is consumed when it is operated on 110 V.

thanks for asking Question..

Answer 2

Answer:

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