driving force of both the alternators is changed, this will result in change _________ A. frequency      C. generated emf B. back emf       D. all of the above 3. If the field of a synchronous motor is under-excited, the power factor will be _________ A. lagging        C. unity B. leading        D. more than unity 4. The power factor of an alternator is determined by _________ A. speed      C. excitation B. load         D. prime mover 5. For proper parallel operation, three-phase alternators must have the same _________ A. speed                 C. kVA rating B. voltage rating      D. excitation

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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(need help for this correct letter/answer thank you)

Choose the Correct Letter

1. An electric motor in which both the rotor and stator fields rotate with the same
speed is called _________ motor.
A. d.c.             C. synchronous
B. Schrage      D. universal

2. Two-alternators are running in parallel. If the driving force of both the alternators
is changed, this will result in change _________
A. frequency      C. generated emf
B. back emf       D. all of the above


3. If the field of a synchronous motor is under-excited, the power factor will be _________
A. lagging        C. unity
B. leading        D. more than unity


4. The power factor of an alternator is determined by _________
A. speed      C. excitation
B. load         D. prime mover


5. For proper parallel operation, three-phase alternators must have the same _________
A. speed                 C. kVA rating
B. voltage rating      D. excitation

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