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Q.
$N$ 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
Maximum efficiency of reversible process is given by
$\eta=1-\frac{T}{T'}$
At $ A P_{0} V_{0} =n R T_{0} $
At $ B 2 P_{0} V_{0} =n R T'$
$ T' = 2 T_{0} $
$ \therefore \eta=1-\frac{T_{0}}{2 T_{0}}$
$=\frac{1}{2}=50 \%$
