question_answer

The temperature-entropy diagram of a reversible engine cycle is given in the figure. Its efficiency is     AIEEE  Solved  Paper-2005

A) 1/2   

B)                       1/4        

C)        1/3  

D)        2/3

Correct Answer: C

Solution :

                According to the figure, Forpathi,1 For path For path 3, Efficiency, \[\eta =\frac{W}{{{Q}_{1}}}=\frac{{{Q}_{1}}-{{Q}_{2}}}{{{Q}_{1}}}\]