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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

Two rings of radius 'R' and 'nR' made of same material have the ratio of moment of inertia about an axis passing through its centre and perpendicular to the plane as 1:8. The value of 'n' is (mass per unit length is constant) [MHT-CET 2020, MHT-CET 2020]

Answer: (A)

Solution

Mass radius so ; gives

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Question ID VK-040983