JEE Main 2026 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 6 April 2026, Shift 1, Physics Q50

Question 50 of 75 in this shift, Physics question 25 of 25, Section B.

A certain gas is isothermally compressed to

\left(\frac{1}{3}\right)^{\mathrm{rd}}

of its initial volume (

V_0=3

litre) by applying required pressure. If the bulk modulus of the gas is

3\times10^5

N/m

^2

, the magnitude of work done on the gas is ________ J.

Official answer

600

NTA final key.

Chapter: Thermodynamics
Topic: First Law of Thermodynamics
Idea tested: Isothermal Bulk Modulus

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.