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If a disc of moment of inertia 1 and rad...

If a disc of moment of inertia 1 and radius r is reshaped into a ring of radius nr, keeping its mass same, its moment of inertia becomes

A

`n^(2)I`

B

`2n^(2)I`

C

`(n^(2))/(2)I`

D

`I`

Text Solution

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The correct Answer is:
B
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