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The moment of inertia of a ring about an...

The moment of inertia of a ring about an axis passing though the centre and perpendicular to its plane is l. It is rotating ring is gently placed `omega` Another identical ring is gently placed on it, so that their centres coincide. If both the rings are rotating about the same axis, then loss in kinetic energy is

A

`(Iomega^(2))/(2)`

B

`(Iomega^(2))/(4)`

C

`(Iomega^(2))/(6)`

D

`(Iomega^(2))/(6)`

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The correct Answer is:
B
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