Electromagnetics
HW.4
Group. 3
Deadline
2/8/89
1)
A spherical distribution of charge
exist in the region
. This
charge distribution is concentrically surrounded by a conducting shell with inner radius
and outer radius
. Determine
and V everywhere.
2)
Three charges
are arranged along the zaxis at
,
respectively.
a)Determine V and
E
at a distant point
b)Find the equations for equipotential surfaces and streamlines.
3) Consider a sphere with radius
and electrical potential
. We put this sphere in a new
dielectric media with constant
. Find the potential of sphere in the second
condition.
4) A dielectric sphere of radius
is centered at the origin. A uniform electric field(without the
dielectric sphere)
is applied . The potential( with the sphere) is given by
a)
Find
for
b)
Find
for
c)
Find
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 Fall '10
 Rejaei
 Electromagnet, Electric charge, Permittivity, Fundamental physics concepts, dielectric sphere

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