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A thin circular metal disc of radius 500...

A thin circular metal disc of radius 500mm is set rotating about a central axis normal to its plane upon raising its temperature gradually, the radius increases to 507.5 mm, the percentage change in the rotational KE will be ___

A

`1.5%`

B

`-1.5%`

C

`3%`

D

`-3%`

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The correct Answer is:
D
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