The electric field intensity outside the charged conducting sphere of radius R
placed in a medium of permittivity E' at a distance 'r' from the centre of sphere
in terms of surface charge density o is
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Explanation:
The electrostatic potential (ϕ
r
) of a spherical symmetric system, kept at origin, is shown in the adjacent figure, and given as
ϕ
r
=
4π∈
o
r
q
(r≥R
0
)
ϕ
r
=
4π∈
o
R
q
(r≤R
0
)R
0
r
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