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MHT CET 2023 Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET 2023

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 solid sphere. The moment of inertia of a sphere about its diameter is

Answer: (A)

Solution

Volume is conserved: . Mass M is unchanged. Disc: . Sphere about a diameter: \frac{2}{5}$ =

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Question ID VK-094510