Physics - Magnetism Question with Solution | TestHub

A current carrying wire is placed in the grooves of an insulating semicircular disc of radius 'R' as shown. The current enters at point A and leaves point B. Value of $\frac{{\mu }_0\mathrm{i}}{4\pi \mathrm{R}}=\frac{30}{\sqrt{3}}$, then determine the magnetic field at point D :