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JEE Main Physics question

PhysicsMechanical Properties of SolidsJEE Main

A wire extends by 1 mm when a force is applied. Double the force is applied to another wire of the same material and length but half the radius of cross-section. The elongation of this wire, in mm, will be

Answer: (A)

Solution

for the same length and material. l_2$ = Δ

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Question ID VK-154971