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Question

According to the principle of conservation of angular momentum, if moment of inertia of a rotating body decreases, then its angular velocity

A

Decreases

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B

Increases

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C

Remains Constant

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D

Becomes zero

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Solution

The correct option is B Increases
$L$ is conserved $⟹ I w = c o n s t a n t$
Now decreasing the Moment of inertia $(I)$ of the rotating body will increase its angular velocity $(w)$

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