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Question

The energy consumed when 5 W power is dissipated for 2 hrs is equal to __ kJ.


A

20

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B

36

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C

48

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D

56

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Solution

The correct option is B

36


Given: Power=5 W
Time=2 hrs=2×3600 s=7200 s
We know that, Power = Energy dissipatedTime

Energy dissipated = Power×Time=5 W×7200 s=36000 J=36 kJ


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