JEE Main 2023 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 8 April 2023, Shift 1, Physics Q34

Question 34 of 90 in this shift, Physics question 4 of 30, Section A.

An aluminium rod with Young's modulus

Y = 7.0\times10^{10}\ \mathrm{N/m^2}

undergoes elastic strain of

0.04\%

. The energy per unit volume stored in the rod in SI unit is:

(1) $2800$
(2) $5600$ Official answer
(3) $8400$
(4) $11200$

Official answer

Option 2

NTA final key.

Chapter: Mechanical Properties of Solids
Topic: Elasticity
Idea tested: Elastic Energy Density

Same idea in other shifts

Asked 4× 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 108 of the 174 JEE Main shifts held from 2017 to 2026.