From a uniform wire, two circular loops are made (i) P of radius r and (ii) Q of radius nr . If the moment of inertia of Q about an axis passing through its centre and perpendicular to its plane is 8 times that of P about a similar axis, the value of n is (diameter of the wire is very much smaller than r or nr )
Text Solution
Verified by ExpertsThe correct answer is:
D
Let mass per unit length of wire is 
.
For wire P ,
Length of wire 
For wire 
,
Mass of wire 
Also 
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