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JEE Main Physics question

PhysicsMechanical Properties of SolidsJEE Main

A metallic ring of radius and cross-sectional area is fitted into a wooden circular disc of radius . If the Young's modulus of the material of the ring is , the force with which the metal ring expands is [EAMCET 2004]

Answer: (B)

Solution

Fitting onto the disc stretches the ring's circumference from to , giving strain \dfrac{2π R-2π r}${2π

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Question ID VK-154857