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Question

A monoatomic ideal gas is taken through a cycle ABCA as shown. The efficiency of the cycle is



Your Answer
A

7%

Your Answer
B

10%

Correct Answer
C

8.7%

Your Answer
D

15%


Solution

The correct option is D

8.7%


Work done = Area =12×P×2V=PV

QAB=nCvΔT=CvRV(2PP)=3PV2

QBC=nCPΔT=CpR2P(3VV)=10PV

η=WQ=2PV23PV×100=8.7%

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