A Carnot’s engine working between 400K and 800K has a work output of 1200 J per cycle. The amount of heat energy supplied to the engine from the source in each cycle is:

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3200 J

2400 J

1800 J

1600 J

answer is B.

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Detailed Solution

Efficiency of Carnot's engine η=1−T2T1=WQ⇒1−400800=1200Q ⇒12=1200Q ⇒Q=2400J

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