Physics 2212
Homework 5 (due: March 29)
1.
What is the electric potential at the point P?
2.
What is the electric potential at the point P?
3.
The potential at the center of a 4.0-cm-diameter copper sphere is 500 V, relative to
V=0 V at infinity. How much excess charge is on the sphere?
4.
Find potential energy for two configurations (a) and (b) shown in Fig. Three particles
have the following charges
1
2
3
1
,
5
,
10
q
C q
C q
C
μ
μ
μ
=
=
= −
. Which configuration has
the lower energy?
+2 nC
P
-6 nC
5 cm
5 cm
+2 nC
45
0
45
0
+1 nC
P
+2 nC
1 cm
1 cm
1 cm
10 cm
2
q
10 cm
3
q
1
q
(b)
10 cm
10 cm
10 cm
3
q
1
q
2
q
(a)

This
** preview**
has intentionally

**sections.**

*blurred***to view the full version.**

*Sign up*