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Q.

The efficiency of a Carnot engine is 60%. If the temperature of source is 1270 C. The sink must be maintained at

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a

113 K

b

+1130 C

c

-1130 C

d

-113 K

answer is C.

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Detailed Solution

η=1−T2T1where, T2 = sink temperature and T1 = source temperature0.6=1−T2400⇒T2400=0.4⇒ T2=160KT2=160K=−113∘C
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The efficiency of a Carnot engine is 60%. If the temperature of source is 1270 C. The sink must be maintained at