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JEE Main Physics question

PhysicsMechanical Properties of SolidsJEE Main

A load of 4.0 kg is suspended from a ceiling through a steel wire of length 2.0 m and radius 2.0 mm. It is found that the length of the wire increases by 0.031 mm as equilibrium is achieved. Taking , the Young's modulus of steel is

Answer: (C)

Solution

\dfrac{mgL}{π r^2Δ l}\dfrac{4×3.1π×2.0}Extra open brace or missing close brace{π×(2×10^{-3})^2$

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Question ID VK-155024