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Q.

The temperature of sink of Camot-engine is 270C. Efficiency of engine is 25%. Then temperature of source is

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a

1500 C

b

570 C

c

1270 C

d

870 C

answer is C.

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Detailed Solution

η = 1-T2T1  ⇒ 25100 = 1-300T1 ⇒34=300T1T1 = 400 K ⇒t1= 1270C
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The temperature of sink of Camot-engine is 270C. Efficiency of engine is 25%. Then temperature of source is