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Q.
The figure shows $P-V$ diagram of a thermodynamic cycle. Which corresponding curve is correct?
Thermodynamics
Solution:
$A \rightarrow B V=$ constant
$\because P V=R T$
Compare with $y=m x$
$P-T$ graph is a straight line which must passes from origin
$A \rightarrow B$ volume constant, $P$-increasing, $T$-increasing.
$B \rightarrow C$ pressure constant, volume - increasing, temperature - increasing
$B \rightarrow C P=$ constant, origin $P-T$ graph is a straightline parallel to $v$-axis
$C \rightarrow D V=$ constant then
$P=\frac{R}{V} T$
$P-T$ graph is straight line must passes from origin
$D \rightarrow A P=$ constant
$P-T$ graph is a straightline parallel to $T$-axis.
