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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

If is the moment of inertia of a thin rod about an axis perpendicular to its length and passing through its centre of mass and is the moment of inertia of the ring formed by bending the rod about an axis perpendicular to plane, then

Answer: (B)

Solution

; the ring has , so , giving

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Question ID VK-040502