JEE Main 2025 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 8 April 2025, Shift 2, Physics Q31

Question 31 of 75 in this shift, Physics question 6 of 25, Section A.

A 3 m long wire of radius 3 mm shows an extension of 0.1 mm when loaded vertically by a mass of 50 kg in an experiment to determine Young's modulus. The value of Young's modulus of the wire as per this experiment is

P \times 10^{11}\ \mathrm{Nm^{-2}}

, where the value of P is: (Take

g = 3\pi\ \mathrm{m/s^2}

)

(1)5Official answer
(2)10
(3)2.5
(4)25

Official answer

Option 1

NTA final key.

Chapter: Mechanical Properties of Solids
Topic: Elasticity
Idea tested: Searle's Experiment for Young's Modulus

Same topic in other shifts

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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.