Question

Q . A 60 W electric lamp gives of energy in the form of light at the rate of 70.5 J/s . what percentage of energy does the lamp transform into light?


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Answer 1

Answer:

The energy given off is 7.5 J /second.This means that the lamp is giving off 7.5W.You simply have to calculate that how much percentage is 7.5of 60.

7.5/60x100= 75/6=12.5%

Explanation:

Answer 2

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