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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//2`

B

`1//4`

C

`1//3`

D

`2//3`

Text Solution

Verified by Experts

The correct Answer is:
c
According to the diagram
`Q_(1) = T_(0)S_(0) + 1/2 T_(0)S_(0) = 3/2 T_(0)S_(0)`
`Q_(2) = T_(0) (2S_(0) - S_(0)) = T_(0)S_(0)`
` Q_(3) = 0 `

`:. Eta = W/Q_(1) = (Q_(1) - Q_(2))/Q_(1) = 1 - Q_(2)/Q_(1) = 1 - 2/3 = 1/3`
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