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JEE Main 2019 Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main 2019

A solid sphere of mass M and radius R is divided into two unequal parts. The first part has a mass of and is converted into a uniform disc of radius 2R. The second part is converted into a uniform solid sphere. Let be the moment of inertia of the disc about its axis and be the moment of inertia of the new sphere about its axis. The ratio is given by:

Answer: (B)

Solution

; new sphere has mass M/8,

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Question ID VK-009495