JEE Main 2025 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 4 April 2025, Shift 2, Physics Q32

Question 32 of 75 in this shift, Physics question 7 of 25, Section A.

A cylindrical rod of length 1 m and radius 4 cm is mounted vertically. It is subjected to a shear force of

10^5

N at the top. Considering infinitesimally small displacement in the upper edge, the angular displacement

\theta

of the rod axis from its original position would be : (shear moduli,

G=10^{10}\ \mathrm{N/m^2}

)

(1) $1/2\pi$
(2) $1/4\pi$
(3) $1/40\pi$
(4) $1/160\pi$ Official answer

Official answer

Option 4

NTA final key.

Chapter: Mechanical Properties of Solids
Topic: Elasticity
Idea tested: Elastic Moduli

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Asked 13× in all

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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.