Question

an electric bulb is rated 200V-100Wthe resistance of the bulb will be-
(1) 2ohm
(2) 400ohm
(3) 20000hm
(4) 0.5ohm

Answer 1

Hey Here Is Your Answer! ! !

P = V^2/ R
100 W = 200^2/ R
100 W = 200 × 200/ R
R= 200 × 200/100
R = 200 × 2
R = 400 ohm

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