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Moment of inertia of a uniform circular ...

Moment of inertia of a uniform circular disc about a diameter is `I`. Its moment of inertia about an axis perpendicular to its plane and passing through a point on its rim will be.

A

5 l

B

6 l

C

3 l

D

4 l

Text Solution

Verified by Experts

The correct Answer is:
B
Moment of inertia of disc about a diameter `=(1)/(4)MR^(2)=I` (given) `therefore MR^(2)=4I`
Now moment of inertia of disc about an axis perpendicular to its plane and passing through a point on its rim
`=(3)/(2)MR^(2)=(3)/(2)(4I)6I`.
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