Question

A cyclic process $A B C D$ is shown below in the given $P-V$ diagram. In the following answers the one that represents the same process as in $P-V$ diagram :

• A.
• B.
• C.
• D.

Answer 1

Answer: (A)

In $P-V$ diagrams process $A B$ is isobaric process in which pressure remains constant i.e, $P=$ constant at all temperatures.
Process $B C$ is isothermal process in which, temperature remains constant i.e., $T=$ constant.
Process $C D$ is isochoric process in which volume remains constant i.e., $P-T$ diagram $C D$ is a straight line passing through origin.
Process $A D$ is adiabatic process which corresponds to process $A D$ in $P-T$ diagram
Hence, the correct $P$ -T diagram is shown in option (a).