Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 24 - Think and Explain - Page 467-468: 46



Work Step by Step

Over the diameter of the bowl, the Earth' magnetic field may be considered to be constant. Though the north pole of the needle is attracted northward, the entire needle doesn't float northward because the other end is attracted southward. The net force on the needle is zero.
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