X and Y are two loops made from same wire. The radii of X and Y are r1 and r2 and their M.I. are I1 and I2. If I_2/I_1 = 4, the value of r_2/r_1 is

Q: X and Y are two loops made from same wire. The radii of X and Y are r1 and r2 and their M.I. are I1 and I2 . If I2/I1 = 4 , the value of r2/r1 is

(a) 42/3

(b) 41/3

(c) 4-2/3

(d) 4-1/3

Ans: (b)