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The temperature -entropy diagram of a re...

The temperature -entropy diagram of a reversible engine cycle is given in the figure. Its efficiency is

A

`1/4`

B

`1/2`

C

`2/3`

D

`1/3`

Text Solution

Verified by Experts

The correct Answer is:
D
(d) `Q_1=T_0S_0+1/2T_0S_0=3/2T_0S_0`
`Q_2=T_0(2S_0-S_0)`
`=T_0S_0`
and `Q_3=0`
`eta=1-(Q_2)/(Q_1)=1-(T_0S_0)/(3/2T_0S_0)=1/3`
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