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Question

A light bulb has a power rating of 1 kW which converts about 10 % electrical energy into visible light. If energy other than visible is waste energy. How many kilo-joules does a light bulb wasted in one hour?

A
36 kJ
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B
90 kJ
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C
3240 kJ
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D
360 kJ
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E
32,400 kJ
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