An ideal gas goes through a reversible cycle $a\to b\to c\to d$ has the $V - T$ diagram shown below. Process $d\to a$ and $b\to c$ are adiabatic.... The corresponding $P - V$ diagram for the process is (all figures are schematic and not drawn to scale)
JEE MAIN 2015, Medium
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In $VT$ graph
$ab-process\,\,\,:\,\,\,Isobaric,\,\,temperature\,increases.$
$bc\,process\,:\,Adiabatic\,pressure\,decreases.$
$cd\,process\,:\,Isobaric\,volume\,decreases.$
$da\,process\,:\,Adiabatic,\,pressure\,increases.$
The above processes correctly respresented in $P-V$ diagram $(b)$ .
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