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Moment of Inertia of a Disc

A closed tube...

Question

A closed tube partially filled with water lies in a horizontal plane. If the tube is rotated about perpendicular bisector, the moment of inertia of the system will

A

Increases

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B

Decreases

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C

Remains constant

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D

Depends on sense of rotation

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Solution

The correct option is B Increases
As tube is rotated about the perpendicular bisector, the mass tries to go away from the axis and the moment of inertia increases.

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