Physics - Magnetism Question with Solution | TestHub

A circular coil having 200 turns, $2.5\times 10^{-4}{\mathrm{m}}^2$ area and carrying $100\mu \mathrm{A}$ current is placed in a uniform magnetic field of 1T. Initially the magnetic dipole moment $(\vec{M})$ was directed along $\vec{B}$. Amount of work, required to rotate the coil through $90^{\circ }$ from its initial orientation such that $\vec{M}$ becomes perpendicular to $\vec{B}$, is ______ $\mu \mathrm{J}$.