JEE Main 2023PhysicsThermodynamicsEasyMCQ

JEE Main 2023 — Thermodynamics Question with Solution

JEE Main 2023 (31 Jan Shift 1)

Question

The pressure of a gas changes linearly with volume from A to B as shown in figure. If no heat is supplied to or extracted from the gas then change in the internal energy of the gas will be

Choose an option

Show full solutionCorrect option: D
Correct answer
D4.5 J

Step-by-step explanation

Given here, ∆Q=0

From first law of thermodynamics, ∆Q=∆U+W, where, ∆U is change in internal energy and W is work done.

We have, ∆U=-W

W=Area under P-V curve=∫PdV

Here, volume decreases, hence work done by system will be negative.

∆U=-W=30×103×150×10-6

=4500×10-3

=4.5 J

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About this question

This is a previous-year question from JEE Main 2023, covering the Thermodynamics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.