an electric bulb of rating 100w,220w. What is the power consumed when it is connected to a 110v source
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Answer:
P = V2/R
If V = 220 V we have
100 W = 2202/R
R = 2202/100 Ω = 484 Ω. This is the resistance of the bulb.
When V = 110 V, power consumed = V2/R = 1102 /484 = 25 W.
Explanation:
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