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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

Two rings of radii R and nR made from the same wire have the ratio of moments of inertia about an axis passing through their centre and perpendicular to the plane of the rings is 1:8. The value of n is [MHT-CET 2022, MHT-CET 2022]

Answer: (B)

Solution

Mass of a ring is proportional to its radius, so ; hence and ,

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Question ID VK-040877