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(A) In the $P-V$ diagram:$1$. Process $AB$ is an isobaric process where pressure remains constant $(P = 	ext{constant})$.$2$. Process $BC$ is an isot

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(A) In the $P-V$ diagram:$1$. Process $AB$ is an isobaric process where pressure remains constant $(P = 	ext{constant})$.$2$. Process $BC$ is an isothermal process where temperature remains constant $(T = 	ext{constant})$.$3$. Process $CD$ is an isochoric process where volume remains constant $(V = 	ext{constant})$.$4$. Process $DA$ is an adiabatic process.Analyzing the $P-T$ diagram:- For process $AB$ $(P = 	ext{constant})$, the graph is a horizontal line.- For process $BC$ $(T = 	ext{constant})$, the graph is a vertical line.- For process $CD$ $(V = 	ext{constant})$, since $PV = nRT$, $P = (nR/V)T$. Thus, $P \propto T$, which is a straight line passing through the origin.- Process $DA$ is an adiabatic process $(PV^{\gamma} = 	ext{constant})$, which corresponds to the curve $DA$ in the $P-T$ diagram.Comparing these features with the given options, the correct $P-T$ diagram is represented by option $(a)$.

$A$ cyclic process $ABCD$ is shown below in the given $P-V$ diagram. Which of the following diagrams represents the same process in a $P-T$ diagram?

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