Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)

Published by Pearson
ISBN 10: 0321740904
ISBN 13: 978-0-32174-090-8

Chapter 33 - Electromagnetic Induction - Exercises and Problems - Page 996: 7

Answer

Since the current flows clockwise around the loop, we can conclude that the magnetic field strength is decreasing.

Work Step by Step

If the magnetic field directed into the page is decreasing, there is less magnetic flux going through the loop. By Lenz's law, a current is induced around the loop which opposes the change in flux. Then, the current must produce a magnetic flux directed into the page. By the right hand rule, this current flows clockwise around the loop. Since the current flows clockwise around the loop, we can conclude that the magnetic field strength is decreasing.
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