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 7.2, Problem 3aT
A wire is formed into a and the leads are twisted together. The sides of the loop are labeled A—D. The direction of the current is shown. (The diagram uses the convention that
1. On the top two diagrams at right, sketch magnetic field lines for the loop. Base your answer on your knowledge of the magnetic field of a current-carrying wire.
Explain why it is reasonable to ignore the effect of the magnetic field from the wire leads.
2. Consider the magnetic field of a bar magnet.
How are the magnetic field lines for the current loop similar to those for a short barmagnet?
Can you identify a “north” and a “south” pole for a current loop?
Devise a rule by which you can use your right hand to identify the magnetic poles of the loop from your knowledge of the direction of the current.
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Please refer to Figure 2 included in this folder. For the moment please disregard the moving charge off to the right. The diagram above shows segments of two long straight wires, carrying currents I_1 = 1.50 A and I_2 = 1.69 A respectively. The distance between the wires is 4.47 cm. What is the force on a 1.60-cm segment of wire #2 due to the magnetic field from wire #1?
An electron moves with a speed of 5.0×107 m/s in the directions shown in Figure 2 below. A 0.50 T magnetic field points in the positive x-direction.
Part A What is the magnitude of the magnetic force in Figure 2)?Express your answer with the appropriate units.
Part B What is the direction of the magnetic force in Figure 2?A 45 ∘ to −y and −z
B 45 ∘ to +y and +z C −y directionD +z direction
An electron moves with a speed of 5.0×107 m/s in the directions shown in figure 1 below. A 0.50 T magnetic field points in the positive x-direction.
Part A What is the magnitude of the magnetic force in Figure 1)?Express your answer with the appropriate units.
Part B What is the direction of the magnetic force in Figure 1)?A 45 ∘ to +y and +z B 45 ∘ to +x and −z C +z directionD −z direction
Chapter 7 Solutions
Tutorials in Introductory Physics
Ch. 7.1 - Investigate the objects that you have been given...Ch. 7.1 - Obtain a permanent magnet and an object that is...Ch. 7.1 - The parts of a permanent magnet that interact most...Ch. 7.2 - On an enlargement of the figure below, sketch...Ch. 7.2 - B. Make prediction for the following five...Ch. 7.2 - Suppose you place a small magnet in a magnetic...Ch. 7.2 - B. Suppose you hold a magnetic compass near a...Ch. 7.2 - Now suppose that you hold the compass at some...Ch. 7.2 - Sketch the magnetic field lines of a...Ch. 7.2 - A wire is formed into a and the leads are twisted...
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