Write the characteristics of equipotential surface.

(N/A) $(1)$ Equipotential surfaces offer an alternative visual representation in addition to the electric field lines around a charge configuration. These surfaces are closer together in regions of strong electric field and farther apart in regions of weak electric field.
$(2)$ No work is done in moving a test charge from one point to another on an equipotential surface because the potential difference between any two points on the surface is zero.
$(3)$ The electric field is always perpendicular (normal) to the equipotential surface at every point.
$(4)$ Two equipotential surfaces can never intersect each other,as that would imply two different values of electric potential at the point of intersection,which is physically impossible.