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JEE Main Physics question

PhysicsMechanical Properties of SolidsJEE Main

The length of a wire is 1.0 m and the area of cross-section is . If the work done for increase in length by 0.2 cm is 0.4 joule, then Young's modulus of the material of the wire is

Answer: (C)

Solution

. With and :

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Question ID VK-155091