the rating of an electric bulb is 220 volt and 100 watt what is the power used when it is used on 110 volt
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Explanation:
R = 220^2/100 Ω = 484 Ω. This is the resistance of the bulb. When V = 110 V, power consumed = V^2/R = 110^2/484 = 25 W. So, 25 W power is consumed when it is operated on 110 V.
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