Draw an equipotential surface for a point charge.

(N/A) An equipotential surface is defined as a surface where the electric potential is the same at every point.
For a point charge $q$,the electric potential $V$ at a distance $r$ is given by the formula $V = \frac{1}{4\pi\epsilon_0} \frac{q}{r}$.
Since $V$ depends only on the distance $r$ from the point charge,all points at a constant distance $r$ from the charge have the same potential.
Therefore,the equipotential surfaces for a point charge are concentric spherical shells centered at the location of the point charge.
In a two-dimensional representation,these surfaces appear as concentric circles surrounding the point charge.