A Carnot engine having an efficiency of 110as heat engine, is used as a refrigerator. If the work done on the system is 10J, the amount of energy absorbed from the reservoir at lower temperature is

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90 J

99 J

100 J

answer is A.

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Detailed Solution

β=1-ηη=1-0.10.1=9 9=Q2W 9=Q210 Q2=90J

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