question_answer

A diatomic ideal gas is used in a Carnot engine as the working substance. If during the adiabatic expansion part of the cycle the volume of the gas increases from V to 32 V, the efficiency of the engine is-                                       [AIEEE 2010]

A)  0.25    

B)       0.5

C) 0.75                       

D)       0.99

Correct Answer: C

Solution :

[c]

Putting