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) 4^2/3

(b) 4^1/3

(c) 4^-2/3

(d) 4^-1/3

Ans: (b)