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Question

A ring has greater moment of inertia than a circular disc of same mass and radius, about an axis passing through its centre of mass perpendicular to its plane, because


A

all mass is at maximum distance from axis

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B

because the centre of the ring does not lie on it

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C

because the ring needs greater inertia to bend it

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D

because the moment produced in the ring is more

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Solution

The correct option is A

all mass is at maximum distance from axis


A ring has a larger moment of inertia because its entire mass is concentrated at the rim at maximum distance from the axis.


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