Question:
Two identical wires $\mathrm{A}$ and $\mathrm{B}$, each of length ' $T$ ', carry the same current I. Wire $\mathrm{A}$ is bent into a circle of radius $R$ and wire $B$ is bent to form a square of side ' $a$ '. If $B_{A}$ and $B_{B}$ are the values of magnetic field at the centres of the circle and square respectively, then the ratio $\frac{B_{A}}{B_{B}}$ is :
Correct Option: 1
Solution:
