Question

if 220V potential difference is applied across an electric bulb, a current of 0.45A flows in the bulb. What must be power of the bulb

Answer 1

p=vI,=220×0.45=99watt ,id anewer of your quation

Answer 2

Power = V*I

V=220V and I =0.45A

Power=220*0.45 = 99W

NOTE: Here in this case we are considering that all electrical energy is converted to light energy. Otherwise answer can differ according to question given.

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