Consider a region inside which there are various types of charges but the total charge is zero. At points outside the region
Options:
(a) the electric field is necessarily zero.
(b) the electric field is due to the dipole moment of the charge distribution only.
(c) the dominant electric field is ` ∝1/r^3` , for large r, where r is the distance from a origin in this region.
(d) the work done to move a charged particle along a closed path, away from the region, will be zero