1.

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

Answer»

`50%`
`25%`
`12.5%`
`75%`

Solution :`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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