Physics - EMI/AC Question with Solution | TestHub

A conducting rod $OP$ of length $L$ rotates with a constant angular velocity $\omega$ about an axis perpendicular to its length and passing through end $O$. The rotation occurs in a region where a non-uniform magnetic field exists, given by $\vec{B}=B_0(r/L)\hat{k}$, where $r$ is the distance from $O$ and $B_0$ is a constant. The rod is in the $xy$ -plane. The free end $P$ of the rod makes electrical contact with a stationary conducting ring of radius $L$. The ring has a total resistance $R$. The axis of rotation at $O$ is connected to the center of the ring through a negligible resistance. Find the steady current flowing through the ring.