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When the temperature of a rod increases ...

When the temperature of a rod increases from t to `r+Delta t`, its moment of inertia increases from I to `I+Delta I`. If `alpha` is the value of `Delta I//I` is

A

`( Delta t )/( t)`

B

`( 2 Delta t )/(t)`

C

`alpha Delta t `

D

`2 alpha Delta t `

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The correct Answer is:
D
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