Question 10

An ideal gas goes through a reversible cycle $$a \rightarrow b \rightarrow c \rightarrow d$$ has the V - T diagram shown below. Process $$d \rightarrow a$$ and $$b \rightarrow c$$ are adiabatic.

The corresponding P - V diagram for the process is (all figures are schematic and not drawn to scale):

(a → b): V↑,T↑ → Isobaric expansion → horizontal line rightward in P ⁣− ⁣V

(b → c): V↑,T↓ → Adiabatic expansion → curve downwards (right)

(c → d): V↓,T↓ → Isobaric compression → horizontal line leftward

(d → a): V↓,T↑ → Adiabatic compression → curve upwards (left)

Option (A) correctly represents this behaviour.

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