Physics - Magnetism Question with Solution | TestHub

Point $P$ is situated at the mid-point of the line joining the centres of the circular wires which have same radii (R). The magnetic fields $(\vec{B})$ at $\mathrm{P}$ due to the currents in the wires are in same direction. Magnitude of magnetic field at point, $P$ $B=2\left\{\frac{{\mu }_{0}NI{R}^2}{2{\left(R^2+\frac{R^2}{4}\right)}^{3/2}}\right\}$ $=\frac{{\mu }_{0}NI{R}^2}{\frac{5^{3/2}}{8}}=\frac{8{\mu }_{0}NI}{5^{3/2}R}$