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One solid sphere ‘A’ and another hollow sphere ‘B’ are of same mass and same outer radii. Their moments of inertia about their diameters are respectiv

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One solid sphere ‘A’ and another hollow sphere ‘B’ are of same mass and same outer radii. Their moments of inertia about their diameters are respectively IA and IB, such that _____________

(a) IA=IB

(b) IA is greater thab IB

(c) IA is lesser than IB

(d) IA/IB =ρA/ρB
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The correct answer is (c) IA is lesser than IB

The explanation is: In a hollow sphere, the mass is distributed away from the axis of rotation. So, its moment of inertia is greater than that of a solid sphere.
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