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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Explanation:
Given V = 220V, P = 100W
P = V^2/R
R = 220^2/100
R = 484 ohm
Power consumed at 110V = V^2/R
P = 110^2/484
P = 25 W
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