The two pistons shown in the diagram have been connected by a spring. The pistons and the cylinder are both insulated. The heater is used to supply heat to the gas. Which of the following graphs repre

Question

The two pistons shown in the diagram have been connected by a spring. The pistons and the cylinder are both insulated. The heater is used to supply heat to the gas. Which of the following graphs represents the process undergone by the gas? Assume that all the heat supplied to the gas is retained by the gas and that the spring is initially undeformed.

TestHub · Accepted Answer

With spring extension x : V 0 ​ = A ℓ 0 ​ and V = A ( ℓ 0 ​ + x ) . Force balance: p = p 0 ​ + A k x ​ , so p is a linear function of V . Hence the P-V graph is a straight line: graph (3).

Physics - Heat & Thermo Question with Solution | TestHub

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