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 8.2, Problem 2cT
Electric generator
Remove the battery and ammeter from circuit in part B and insert micro-ammeter as shown.
1. Suppose that the coil is made to spin by an external agent such as yourself.
Predict the deflection of the micro-ammeter needle throughout a complete revolution of the coil.
How would your prediction change if:
•the coil were made to rotate the other way?
•the poles of the magnet were reversed?
2. Check your predictions by gently rotating the coil so that it spins for a little time on its own before coming to a stop.
When the coil of the apparatus above is made to spin by an external agent, the apparatus is called an electric generator.
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Part A
What is the magnitude of the torque on the current loop in (Figure 1)?
Figure
1 of 1
Express your answer in newton-meters.
• View Available Hint(s)
ΑΣφ
?
2.0 cm
T =
N. m
2.0 mm
Wire
2.0 A
Submit
0.20 A
Part A
Find the direction of the magnetic field at each of the indicated points.
What is the direction of the magnetic field BA at Point A?
• View Available Hint(s)
O BA is out of the page.
O BA is into the page.
O BA is neither out of nor into the page and BA +0.
BA = 0.
Submit
Figure
1 of 1
Part B
What is the direction of the magnetic field BB at Point B?
O BR İS out of the page.
A
O BR is into the page.
B
BB is neither out of nor into the page and BB +0.
BB = 0.
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30°
Phasor at t
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Chapter 8 Solutions
Tutorials in Introductory Physics
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