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 time is that of P about a similar axis, the value of n is (diameter of the wire is very much smaller than r or nr)

Q: 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 time is that of P about a similar axis, the value of n is (diameter of the wire is very much smaller than r or nr)

(a) 8

(b) 6

(c) 4

(d) 2

Ans: (d)