Q. Two identical wires A and B have the same length *l* and carry the same current I. Wire A is bent into a circle of radius R and wire B is bent to form a square of side a. if B_{1} and B_{2} are the values of magnetic induction at the center of the circle and the center of the square, respectively, then the ratio B_{1}/B_{2} is

(a) (π²/8)

(b) (1/8)

(c) (π²/16)

(d) (π²/16√2)

Ans: (b)