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JEE Main 2003 Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main 2003

A circular disc of radius is made from an iron plate of thickness , and another disc of radius 4R is made from an iron plate of thickness . Then the relation between the moment of inertia and is

Answer: (4)

Solution

Mass : and . Moment of inertia of a disc about its axis $I =

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Question ID VK-038080