Physics - Magnetism Question with Solution | TestHub

A loop ABCDA , carrying current $\mathrm{I}=12\mathrm{A}$, is placed in a plane, consists of two semi-circular segments of radius $R_1=6\pi \mathrm{m}$ and ${\mathrm{R}}_2=4\pi \mathrm{m}$. The magnitude of the resultant magnetic field at center O is $\mathrm{k}\times 10^{-7}\mathrm{T}$. The value of k is ______ (Given ${\mu }_0=4\pi \times 10^{-7}\mathrm{Tm}{\mathrm{A}}^{-1}$)