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JEE Main 2012 Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main 2012

A circular hole of diameter R is cut from a disc of mass M and radius R; the circumference of the cut passes through the centre of the disc. The moment of inertia of the remaining portion of the disc about an axis perpendicular to the disc and passing through its centre is

Answer: (4)

Solution

The removed disc has radius , mass and centre at from O. Its moment of inertia about O: $Missing argument for \frac\frac12ยทMissing argument for \frac\frac

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Question ID VK-103360