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The voltage obtained from several coils connected in series is 75 V. What voltage will be obtained if the speed is reduced from 1800 rpm to 1200 rpm?

The voltage obtained from several coils connected in series is 75 V. What voltage will be obtained if the speed is reduced from 1800 rpm to 1200 rpm?

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
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Question
2. The voltage obtained from several coils connected in series is 75 V. What voltage will be obtained if the speed is reduced from 1800 rpm to 1200 rpm?
Transcribed Image Text:2. The voltage obtained from several coils connected in series is 75 V. What voltage will be obtained if the speed is reduced from 1800 rpm to 1200 rpm?
Expert Solution
Step 1

The emf generated in the machine is given by the expression as shown below: 

E=PϕNZ60

Since the other parameters of the machine are constant, the emf generated can be expressed in the terms of the speed as shown below: 

PϕZ60=k=constantE=kNE∝N

 

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