Home Physics Elasticity ( Mechanical Properties of Solids ) JEE Main 2023 An aluminium rod with Young's modulus Y = 7.…
Physics Elasticity ( Mechanical Properties of Solids ) JEE Main 2023 MCQ (Single Correct)

An aluminium rod with Young's modulus Y = 7. 0 x 10 10 N m -2 undergoes elastic strain of 0. 04%. The energy per unit volume stored in the rod in SI unit

A
2800
B
11200
C
5600
D
8400

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Text Solution

Verified by Experts
The correct answer is:
C

The data given is

Y = 7 x 10 10 N m -2 and

Young's modulus is given by the ratio of stress and strain,

The energy stored is given as

…(i)

The energy per unit volume can be written from equation (i)

….(ii)

Substituting the values in equation (ii)

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