Shown in the figure is a shell made of a conductor. It has inner radius 
and outer radius 
, and carries charge 
. At its centre is a dipole 
as shown. In this case:
Text Solution
Verified by ExpertsB
Total charge of dipole 
, so charge induced on outside surface 
.
But due to non-uniform electric field of dipole, the charge induced on inner surface is non zero and non-uniform.
So, for any observer outside the shell, the resultant electric field is due to 
uniformly distributed on outer surface only and it is equal to.
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