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Chapter 3. Electric Potential
• Constant electric field


F  qE - conservative?
• The Electric Potential: V
- Single Charge
- Dipole
potential energy function?

E  Const
V ( x)   Ex
For a point charge at the origin:
1
q
V (r ) 
40 r
Ch3 Quiz 1
There is an electric field given by


E  E0ix
where E0 is a constant.
What is the difference in the value of the electric potential
due to this electric field between the origin and the point
x=a, y=b?
Ch3 Quiz 2
There is an electric field given by



2
2
E   x ix  y i y
where  and  are constants.
What is the difference in the value of the electric potential
due to this electric field between the origin and the point
x=a, y=b?
Ch3 Quiz 3
There is an electric field created by some source at the
origin given by 
c 
E 
4
ir
r
where
c
is
a
constant
and
r
is
the
distance
from
the
origin;

ir points out from the origin.
What is the difference in the value of the electric potential
due to this electric field between the point x=a, y=b and
the point at infinity?
What is the potential function corresponding to this
electric field if instead of being at the origin the source
of the electric field is at point x=a, y=b?
Have a great day!
Hw: All Chapter 3 problems
and exercises
Reading: Chapter 4