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

An electric bulb is rated 220 V and 100 W. When it is operated on 110

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> Solution :Resistance of bulb `R= (V^2)/P =((220)^2)/(100) =22xx22 = 484 Omega` Power CONSUMED by the bulb when connected to mainsline `P =(V_1^2)/(R) = (110xx 110)/(484) =25 watts`

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

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