A cyclic process ABCA is shown in the V-T diagram. Process on the P-V diagram is -
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(3) From the given VT diagram,
In process AB, V ∝ T ⇒ Pressure is constant (As quantity of the gas remains same)
In process BC, V = Constant and in process CA,
T = constant
∴ These processes are correctly represented on PV diagram by graph (3).