Question

an electric bulb is rated 22V and 100W when it operated on 110V the power consumed will be what?

Answer 1

We know,Power P= V²/R,  where V is the rated voltage and R is the resistance

P₁=V²/R,  R= V²/P= (22)²/100 = 4.84 Ω

If rated voltage is 110V, Power consumedwillbe

P= V²/R= (110)²/4.84= 2500 W