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Consider a region inside which there are various types of charges but the total charge is zero. At points outside the region
\( \mathrm{P} \)
(a) the electric field is necessarily zero.
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(b) the electric field is due to the dipole moment of the charge distribution only.
(c) the dominant electric field is \( \propto \frac{1}{r^{3}} \), 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.
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