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Two rings of radii R & nR made from the ...

Two rings of radii R & nR made from the same wire have the ratio of M.I about an axis passing through their centre equal to 1 : 8. The value of n is

A

2

B

`2 sqrt(2)`

C

4

D

`(1)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
a
`[(I_(1))/(I_(2)) = (MR^(2))/(nM(nR)^(2)) = (1)/(n^(3)) = (1)/(8) rArr n = 2]`
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