Question

A cyclic process $ABCD$ is shown in $P-V$ diagram for an ideal gas. Which of the following diagram represents the same process?

• A.
• B.
• C.
• D.

Answer 1

Answer: (A)

$AB\to$ Constant $P$, increasing $V$, increasing $T$
$BC\to$ Decreasing $P$, increasing $V$, constant $T$
$CD\to$ decreasing $P$, Constant $V$, decreasing $T$
$DA\to$ increasing $P$, decreasing $V$, Constant $T$
Also $BC$ is at higher temperature than $AD$ hence graph $C$ is correct curve.