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JEE Main Physics question

PhysicsMechanical Properties of SolidsJEE Main

A stress of is applied on a wire. If the modulus of elasticity of the wire is , then the percentage increase in the length of the wire will be

Answer: (B)

Solution

1\ kgf/mm^2 = 1000\times980\ dyne / 0.01\ cm^2 = 9.8\times10^7\ dyne\,cm^{-2}. Strain

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Question ID VK-155026