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 8.1, Problem 1dT
D. State whether you agree or disagree with each of the students below. If you agree, explainwhy. If you disagree, cite a specific case for which the student’s statement does not give thecorrect answer. (Hint: Consider cases A and B above.)
Student 1: "The magnetic field due to the loop always opposes the external magnetic field."
Student 2: "The flux due to the loop always has the opposite sign as the flux due to the external magnetic field."
Student 3: "The flux due to the loop always opposes the change in the flux due to the external magnetic field."
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Written work 1
Directions: Write the direction of the missing component of the given figures
below. Also, sketch the FBD of the missing component. Do this on a
separate sheet of yellow pad paper.
F
1. Find the direction of the magnetic
field experiences by an electron
shown on figure 8.
2. Find the direction of the proton's
magnetic force shown on figure 9.
3. Find the direction of the negative
charge particle's magnetic force
shown on figure 10.
B
v
Figure 8
v
Figure 9
v
X X
X X
XX
Figure 10
B
B. A small current loop is placed near the end of a large magnet as
shown.
1. Draw vectors to show the magnetic force on each side of the
loop.
What is the net effect of the magnetic forces exerted on the
loop?
2. Suppose that the loop were to rotate until oriented as shown.
Now, what is the net effect of the magnetic forces exerted on
the loop?
Is there an orientation for which there is no net torque on the loop? Drawa diagram to
illustrate your answer.
3. Are your results above consistent with regarding the current loop as a small magnet?
Label the poles of the current loop in the diagrams above and check your answer.
The Earth's magnetic field points due north with a strength of 60 uT. How fast and in what direction would an electron have to go to
float, that is for the magnetic force to exactly balance out the electron's weight? Show your work.
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Chapter 8 Solutions
Tutorials in Introductory Physics
Ch. 8.1 - A copper wire loop is placed in a uniform magnetic...Ch. 8.1 - Suppose that the loop is now placed in the...Ch. 8.1 - In each of the diagram below, the position of a...Ch. 8.1 - D. State whether you agree or disagree with each...Ch. 8.1 - The diagram at right shows a stationary, copper...Ch. 8.1 - To understand the interaction between the wire...Ch. 8.1 - A wire loop moves from a region with no magnetic...Ch. 8.1 - At two later instants, t=t1andt=t1+t the loop is...Ch. 8.2 - The resistance of loop 2 is greater than that loop...Ch. 8.2 - Suppose that loop 2 were replaced by a wooden...
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