The figure shows equipotential surfaces for a two charges system. At which of the labeled points will an electron have the highest potential energy?

Two large identical plates are placed in front of each other at $x=d$ and $x=2d$ as shown in the figure. If charges on plates are $Q$ and $-5Q$, the potential versus distance graph for region $x=0$ to $x=3d$ is ($d$ is very small and potential at $x$$=0$ is $\left.v_{\mathrm{e}}\right)$

An electric dipole of dipole moment $\overrightarrow{p}$ is oriented parallel to a uniform electric field $\overrightarrow{E}$, as shown. It is rotated to one of the four orientations shown below. Rank the final orientations according to the change in the potential energy of the dipole-field system, most negative to most positive.

The figure shows the potential due to two similarly charged infinite sheets with charge per unit area ${\sigma }_2$ and ${\sigma }_1$. From examining this plot we can deduce that

Find the ratio of electric work done in bringing a charge $q$ from $A$ to $B$ $\left(W_{AB}\right)$ and then from $B$ to $C\left(W_{BC}\right)$ in a sphere of charge $Q$ distributed uniformly throughout its volume. $\left(\frac{W_{AB}}{W_{BC}}=?\right)$

An electron travelling in a uniform electric field passes from a region of potential $V_1$ to a region of higher potential $V_2$. Then

A conducting sphere of radius $R$ and a concentric thick spherical shell of inner radius $2R$ and outer radius $3R$ is shown in the figure. A charge $+10Q$ is given to the shell and the inner sphere is earthed. Then charge on the inner sphere is: