Question

A light bulb is switched on for 40s. If the electrical energy consumed by the bulb during this time is 2400 J, find the power of the bulb.

Answer 1

Ans.   Given that,
t -40s, w = 2400 J   and P = ? Using the formula: Electric energy Power = ——       -^
P =     q~ = 60 Js"  = SOW
Hence, power of the bulb is 60 watt.

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