Electric ,plz helpppppp At a distance of 1.60m from a point charge of +2.00 x 10 -6 C, there is an equipotential surface. At greater distances there are additional equipotential surface. The potential difference between any two successive surfaces is 1.00 x 10 3 V . Starting at a distance of 1.60 m and moving radially outward , how many of the additional equipotential surfaces are crossed by the time the electric field has shrunk to one half its initial value? Do not include the starting surface.