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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A disc of radius R and thickness has moment of inertia I about an axis passing through its centre and perpendicular to its plane. Disc is melted and recast into a soild sphere. The moment of inertia of a sphere about its diameter is [MHTCET 2015]

Answer: (A)

Solution

Equal volumes give sphere radius ; and $=Missing argument for \frac\frac25M(Missing argument for \frac\frac

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Question ID VK-040798