Two circular iron discs are of the same ...

Two circular iron discs are of the same thickness. The diameter of A is twice of B . The moment of inertia of A as compared to that of B is

twice as large

four times as large

eight times as large

16 times as large

Text Solution

Verified by Experts

The correct Answer is:

Mass of disc `prop`area `M_(A)=4M_(B) ` (as `R_(A)=2R_(B)`)
`(I_(A))/(I_(B))=(1/2M_(A)R_(A)^(2))/(1/2M_(B)R_(B)^(2))`

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