Solution

A square coil of side $15\,\mathrm{cm}$ each consists of $60$ turns. Initially, it is located in a uniform magnetic field of magnitude $0.8\,\mathrm{T}$ such that plane of the coil is perpendicular to the field. The coil is then turned through an angle of $\theta = 30^{\circ}$ in a time of $2\,\mathrm{s}$. Determine the average induced emf.