MCQ
$n$ mole a perfect gas undergoes a cyclic process $ABCA$ (see figure) consisting of the following processes.
$A \rightarrow B :$ Isothermal expansion at temperature $T$ so that the volume is doubled from $V _{1}$ to $V _{2}=2 V _{1}$ and pressure changes from $P _{1}$ to $P _{2}$
$B \rightarrow C :$ Isobaric compression at pressure $P _{2}$ to initial volume $V _{1}$
$C \rightarrow A$ : Isochoric change leading to change of pressure from $P _{2}$ to $P _{1}$
Total workdone in the complete cycle $ABCA$ is
- A$0$
- B$nRT \left(\ln 2+\frac{1}{2}\right)$
- C$nRTIn2$
- ✓$nRT \left(\ln 2-\frac{1}{2}\right)$
