Answered: 5) A-In general, which of the following…

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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5) A-In general, which of the following is/are a factor that will determine the sync5hronous speed of a 3-phase motor?
a) frequency b) number of stator poles per phase c) both "a" and "b" d) neither "a" nor "b"
B-Which of the following is the correct formula used to determine the synchronous speed of a 3-phase motor?
a) speed = [(120 ÷ frequency)] number of poles
b) speed = [(120)( number of poles)] frequency
c) speed = [(120)(frequency)] ÷ number of poles
d) none of the above
C- How may the direction of rotation of a 3-phase motor be reversed?
a) by interchanging any two of the three supply lines
b) by interchanging all three of the supply lines
c) only by swopping line-1 with line-3
d) none of the above

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