`N` moles of a monoatomic gas is carried round the reversible rectangular cycle `ABCDA` as shown in the diagram. The temperature at `A` is `T_0`
The thermodynamic efficiency of the cycle is :

Options

A. `15%`
B. `50%`
C. `20%`
D. `25%`

Answer

B

Explanation

Maximum efficiency of reversible process is given by
`eta = 1 -(T)/(T')`
At `AP_0 V_0 = nRT_0`
`B_2 P_0 V_0 = nRT'`
`T' = 2T_0`
`:. eta = 1 -(T_0)/(2 T_0) = (1)/(2) = 50 %`.