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5. Electrical polarity at the brushes may be changed by

5. Electrical polarity at the brushes may be changed by

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Select the correct answer for each of the following statements

Book Source: Electricity 3 | 10th Edition ISBN-13:9781111646738 ISBN:1111646732 Authors:Jeffrey J. Keljik

5. Electrical polarity at the brushes may be changed by a. reversing the rotation of the armature. b. reversing the direction of the field current. c. either a or b
Transcribed Image Text:5. Electrical polarity at the brushes may be changed by a. reversing the rotation of the armature. b. reversing the direction of the field current. c. either a or b
d. neither a nor b B. Select the correct answer to questions 6 through 9 from the following list, and write it in the space provided. power source only one always strength of the field flux speed of the armature either 6. In addition to armature rotation, the output voltage varies with the 7. One factor limiting an increase in output voltage is the 8. A change in the speed of rotation of the armature decrease sometimes increase searin results in a change in the output voltage. 9. If the field poles are saturated, an increase in the field current does not cause a(n) in the output voltage.
Transcribed Image Text:d. neither a nor b B. Select the correct answer to questions 6 through 9 from the following list, and write it in the space provided. power source only one always strength of the field flux speed of the armature either 6. In addition to armature rotation, the output voltage varies with the 7. One factor limiting an increase in output voltage is the 8. A change in the speed of rotation of the armature decrease sometimes increase searin results in a change in the output voltage. 9. If the field poles are saturated, an increase in the field current does not cause a(n) in the output voltage.
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