Which of the following is an equivalent cyclic process corresponding to the thermodynamic cycle given in the figure? where, 1 → 2 is adiabatic. (Graphs are schematic and are not to scale) (A) (B) (C) Numerical answer type. Work it out, then open the answer.

Answer: b. 1 → 2 adiabatic expansion: V increases and T decreases. 2 → 3 isobaric compression: V ∝ T, so on a V - T graph it is a straight line towards the origin, with V and T both falling. 3 → 1 isochoric pressure rise: V constant, T increases (horizontal line to the right). Only graph (B) shows all three. So the answer is (B).

Which of the following is an equivalent cyclic process corresponding… | JEE Main 2020 (9 Jan, Shift 1)

Q58JEE Main 2020 · 9 JAN · SHIFT 1Difficult

P-V Diagrams & Cyclic Processes

Which of the following is an equivalent cyclic process corresponding to the thermodynamic cycle given in the figure? where, 1 $\rightarrow$ 2 is adiabatic.

(Graphs are schematic and are not to scale)

(A)

(B)

(C)

Numerical answer type. Work it out, then open the answer.

Show answer and solution

Answer: b

$1 \to 2$ adiabatic expansion: $V$ increases and $T$ decreases.
$2 \to 3$ isobaric compression: $V \propto T$ , so on a $V$ - $T$ graph it is a straight line towards the origin, with $V$ and $T$ both falling.
$3 \to 1$ isochoric pressure rise: $V$ constant, $T$ increases (horizontal line to the right).
Only graph (B) shows all three. So the answer is (B).

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