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The diameter of a rotating fly wheel is ...

The diameter of a rotating fly wheel is R. Its coefficient of linear expansion is `alpha`. If the temperature is increased by `Delta T`, the percentage change in its rotational KE would be

A

`alpha.Delta t.100`

B

`2alpha.Delta t.xx100`

C

`(alpha Delta t)/(2)xx100`

D

`(2alpha Delta t)/(5)xx100`

Text Solution

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The correct Answer is:
B
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