an electric bulb is rated 220V and 100 W, when it is operated on 110 V. calculate the power consumed by it
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Answer:
P = V^2/R
R = V^2/P = 220^2/100 = 484 ohms
when V = 110
P = V^2/R = 110^2/484 = 25 Watt .
hope it is helpful.......
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