Physics, asked by manoharanmsi9613, 1 year ago

An electric bulb is rated 220V- 100W. The power consumed by it when it operates on 110V is

Answers

Answered by rishabh2004

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.

Answered by Jiya22

Power = V²/R
W = V²/R
100 = 220²/R
R = 48400/100
R = 484 Ω

P = 110² V/ 484Ω
P = 12100/ 484
P = 25W

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