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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

Two circular rings 'A' and 'B' of radii 'nR' and 'R' are made from the same wire. The moment of inertia of 'A' about an axis passing through the centre and perpendicular to the plane of 'A' is 64 times that of ring 'B'. The value of 'n' is [MHT-CET 2021, MHT-CET 2021]

Answer: (B)

Solution

Same wire means mass radius, so ;

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Question ID VK-040936