Q.

The efficiency of a Carnot’s engine working between 400K and 800 K is

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a

0.5

b

0.4

c

0.33

d

0.6

answer is A.

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Detailed Solution

efficiency of heat engine=η=1−T2T1given T1=800K;T2=400Kη=1−400800=1−12=0.5
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