Question

if 220V potential difference is applied across an electric bulb,a current of 0.45A flows in the bulb. what must be the power of the bulb?
a)99W
b)70W
c)45W
d)22W​

Answer 1

given :- V = 220 V

             I  = 0.45 A

so Power  = V * I

       P       = 220 * 0.45

       P       = 99 watts

so the answer is (a) 99 W

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Answer 2

p=VxI

P=220x0.45

P=99watt