NEET Exam Model Paper 2

Two identical wires A and B have the same length 'L' and carry the same current 1. Wire A is bent into a circle of radius 'R' and wire B is bent to form a square of side 'a'. If B1and B2 are values of magnetic induction at the centre of the circle and the centre of the square B, respectively, then the ratio

B1

B2

is