A circular disc of radius R and thickness 
has moment of inertia I about an axis passing through its centre and perpendicular to its plane. It is melted and recasted into a solid sphere. The moment of inertia of the sphere about its diameter as axis of rotation is
A
I
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
If the radius of the sphere is 
then the volume of the sphere must be equal to that of the disc
The moment of inertia of the disc
The moment of inertia of the sphere
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