Physics - Electrostatics Question with Solution | TestHub

Electric field given by the vector $\overrightarrow{\mathrm{E}}=\frac{{\mathrm{E}}_0}{\ell }(x\hat{\mathrm{i}}+\mathrm{y}\hat{\mathrm{j}})\mathrm{N}/\mathrm{C}$ is present in the x-y plane. A small ring of mass M carrying charge +Q, which can slide freely on a smooth non conducting rod, is projected along the rod from the point $(0,\ell )$ such that it can reach the other end of the rod. Assuming there is no gravity in the region. What minimum velocity should be given to the ring (in m/s)? If in S.I. unit $\frac{{\mathrm{QE}}_0\ell }{\mathrm{M}}=8$