Q.

An electrical bulb rated 220V,100W is connected in series with another bulb rated 220V,60W. If the voltage across combination is 220V, the power consumed by the  100W  bulb will be about -----W. (Round off to the nearest integer)

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answer is 14.

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Detailed Solution

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For bulb 1

R1=V2P=2202100=484

For bulb 2

R2=V2P=220260=484106

I=220484+484×106

P1=I2R1=14.06W

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