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The efficiency of a heat engine working ...

The efficiency of a heat engine working between `27^(@)C` and `127^(@)C` is:

A

`50%`

B

`25%`

C

`12.5%`

D

`75%`

Text Solution

Verified by Experts

The correct Answer is:
B
`T_(1) =127^(@)C = 400 K`
`T_(2)=27^(@)C = 300 K`
Efficiency, ` n= 1- (T_(2))/(T_(1))= 1- (300)/(400)= 1-(3)/(4)= (1)/(4)= 0.25`
n= 25 %
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