an electric bulb is rated 220 v and 100 watts.What is the power consumed when it is operated on 110 v ?
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An electric bulb is rated 220V and 100W. when it is operated on 110V, what will be the power consumed? R = 2202/100 Ω = 484 Ω.
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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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