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Question

A lamp consumes 1000J of electrical energy in 10s. What is its power?


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Solution

Determine the power of the lamp

It is given that the lamp consumes 1000J of electrical energy in 10s.

Thus, consumed energy, E=1000J.

The time taken, t=10s.

Therefore, the power, P=Et.

P=1000J10sP=100W

Hence, the power of the lamp is 100W.


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