Physics - Magnetism Question with Solution | TestHub

A circular coil of$100$turns and effective diameter$20 \mathrm{cm}$carries a current of$0.5 \mathrm{A}$. It is to be turned in a magnetic field of$B=2 \mathrm{T}$from a position in which the normal to the plane of the coil making an angle$\mathrm{\theta }$with magnetic field changes from$\mathrm{\theta }=0^{°}$to$\theta ={180}^{\mathrm{o}}$. The work required in this process is