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Electromagnetics
School of Electrical and Computer Engineering
University of Tehran
Supplementary Exercises
SE02
Subject: The Electrostatic Field
Fall Semester 1384
Problem 1:
(Griffiths P2.6)
Find the electric field a distance
z
above the center of a flat circular disc of radius
R
,
which carries a uniform surface charge
σ
. What does your formula give in the
limit
? Also check the case
.
∞
→
R
R
z
>>
Problem 2:
(Griffiths P2.7)
Find the electric field a distance
z
from the center of a spherical surface of radius
R
,
which carries a uniform charge density
σ
. Treat the case
R
z
<
(inside) as well as
(outside). Express your answer in term of total charge
q
on the sphere.
R
z
>
Problem 3:
(Griffiths P2.10)
A charge
q
sits at the back corner of a cube, as shown. What is the flux of
E
r
through the
shaded side of Figure 1?
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View Full DocumentProblem 4:
(Griffiths P2.18)
Two spheres each of radius
R
and carrying uniform volume charge densities
ρ
+
and
−
,
respectively, are placed so that they partially overlap (Figure 4). Call the vector from the
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 Spring '11
 Dolatabadi
 Electromagnet

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