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Consider a region inside which there are...

Consider a region inside which there are various types of charges but the total charge is zero. At points outside the region

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 `prop 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.

Text Solution

Verified by Experts

The correct Answer is:
C, D
When the sum of different charges in any area is zero, then some amount of electric dipole can be imagined.
Hence, electric field at point at large distance r outside this area varies according to `prop 1/r^(3)`.
Also, electric field is conservative. Work done by charge moving in closed loop away from this area is zero.
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