Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 21 - Electromagnetic Induction and Faraday's Law - Problems - Page 621: 25

Answer

92 volts

Work Step by Step

It is apparent from equation 21–5 that the back emf is proportional to the angular speed of rotation. If the angular speed rises by a factor of (2300/1800), the back emf rises by the same factor. Find the new back emf. $$(72V)\frac{2300rpm}{1800rpm}=92V$$
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