Physics - Magnetism Question with Solution | TestHub

A horizontal overhead power line is at a height of $4\mathrm{m}$ from the ground and carries a current of $100\mathrm{A}$ from east to west. The magnetic field directly below it on the ground is $\left({\mu }_0=4\pi \times 10^{-7}\mathrm{T}\mathrm{m}{\mathrm{A}}^{-1}\right)$