The moment of inertia of a body is I and its \( \mathrm{P} \) coeff...

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The moment of inertia of a body is I and its
\( \mathrm{P} \) coefficient of linear expansion is \( \alpha \). If

W temperature of body rises by a small amount \( \Delta \mathrm{T} \), then change in moment of inertia about the same axis is :-
(1) \( \alpha \mathrm{I} \Delta \mathrm{T} \)
(2) \( 2 \alpha \) I \( \Delta \mathrm{T} \)
(3) \( 4 \alpha I \Delta T \)
(4) \( \frac{\alpha I \Delta T}{2} \)
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