22.6 A Point Charge in an Electric Field A point charge is placed in a region of space where the electric field varies with location. No force will be exerted on this charge at locations where the electric field lines cross. if the charge is moving perpendicular to a field line. at locations where the electric field is zero. at locations where the magnitude of the electric field is smaller than
9.0\times 10^(4)(N)/(C)
. if the charge is moving along a field line.