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CBSE Class 10 Answered

A 60 W electric lamp gives off energy in the form of light at the rate of 7.5 J/s.
Asked by | 19 Mar, 2010, 10:41: AM
Expert Answer

Amount of energy given out in the form of light, 7.5 J/s = 7.5 W.

Amount of energy transformed into light = 7.5x100/60 = 12.5 %

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Team,

TopperLearning.

Answered by | 19 Mar, 2010, 06:54: PM
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