Answered: 30. A) Why is there a small emf…

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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30. A) Why is there a small emf generated in a series generator at no load?
a) the residual magnetic field establishes a low density magnetic field which the armature conductors cut

b) the series field does not contribute any magnetic strength, because the field strength is a product of Ampere-Turns and there is no current through the series field with no load

c) the amount of emf generated in a series generator is directly proportional to the load current

d) all of the above

B) What happens to the generated emf as load is added?
a) voltage should increase provided the field is connected in the correct polarity

b) voltage should decrease regardless of the field connection polarity

c) either "a" or "b"

d) neither "a" nor "b"

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