Physics - Magnetism Question with Solution | TestHub

A circular coil has moment of inertia$0.8 \mathrm{kg} {\mathrm{m}}^2$around any diameter and is carrying current to produce a magnetic moment of$20 {\mathrm{Am}}^2$. The coil is kept initially in a vertical position and it can rotate freely around a horizontal diameter. When a uniform magnetic field of$4 \mathrm{T}$is applied along the vertical, it starts rotating around its horizontal diameter. The angular speed the coil acquires after rotating by${60}^{\mathrm{o}}$will be :