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JEE Main Physics question

PhysicsMechanical Properties of SolidsJEE Main

A steel wire of cross-sectional area is stretched by a force of 1000 N, producing an extension of 1 mm, and the work done on it is . Another wire of the same material and length, but with four times the diameter, is stretched by the same force, doing work . Then and are respectively

Answer: (A)

Solution

. For the first wire, . Since

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Question ID VK-154931