Physics, asked by bhattanjali6976, 1 year ago

A bulb of 100 watt rated 220 v is used at 110 v. What watt power is being consumed?

Answers

Answered by Sajiya70
1

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.

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