Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Textbook Question
Chapter 21.1, Problem 3cTH
Would end 2A attract, repel, or neither attract nor repel end 3A if the two ends were brought near one another? If it is not possible to tell for certain, what are the possibilities? Explain.
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Q4: Answer the following
Q.4: Two small metallic spheres, each of mass m = 0.200 g, are suspended as
pendulums by light strings of length L as shown in Fig.1. The spheres are
given the same electric charge of 7.2 nC, and they come to equilibrium when
each string is at an angle of 0-5° with the vertical. How long are the strings?
Fig. 1
y
Figure 3: 7= xi+ yj+zk = pcos
cos oi + p sin oj + zk = pp+ zk and i =
dr
dt
-p sin oi + p cos oj + k = po + zk . Notice that cyclotron angular velocity we =
do
COS
is a negative constant, i.e. in the figure the particle is circulating clockwise.
3. Consider a charged particle, q, in the presence of a magnetic field B with velocity i = it + üz = ü + ij at position relative to origin
experiencing a magnetic force qü x B. From the second law it follows that the kinetic energy of the particle remains constant[ see figure 3] :
d mv2
m[v² + v?]
du
- 0 =
dt
(a) : qü x B
m ä - i [gữ x B] = ū. [m-
= constant
(True, False)
dt 2
(b) : A [B x Č)
Č [Ä x B] = B IC x A] (True, False)
Calculus III problem: Vector field
Draw a vector field with...
1. Positive divergence at the origin.
2. Positive divergence at (1,0) and positive divergence at (-1,0).
3. Positive divergence at (1,0) and negative divergence at (-1,0).
4. Curl at the origin that is in the positive z-direction.
5. Curl at (1,0) in the positive z-direction, and curl at (-1,0) in the positive z-direction.
6. Curl at (1,0) in the positive z-direction, and curl at (-1,0) in the negative z-direction.
7. Zero divergence and zero curl everywhere.
8. Both nonzero divergence and nonzero curl at the origin.
Chapter 21 Solutions
Tutorials in Introductory Physics
Ch. 21.1 - Based on your experience with electric field...Ch. 21.1 - Carefully draw the magnetic field lines for the...Ch. 21.1 - Based on the magnetic field lines you have drawn,...Ch. 21.1 - Two identical magnets are placed as shown. Using...Ch. 21.1 - To which of your three classes from section I of...Ch. 21.1 - To which of your three classes could bar 2 belong?...Ch. 21.1 - Would end 2A attract, repel, or neither attract...Ch. 21.2 - A magnet is hung by a string and then placed near...Ch. 21.2 - Draw a vector on the diagram to show the direction...Ch. 21.2 - Suppose that a third wire, carrying another...
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