Answer
(b) electron spin
Work Step by Step
The main source of magnetism in magnetic materials is electron spin. It is a completely quantum mechanical effect and does not have any classical analog.
College Physics (7th Edition)
by Wilson, Jerry D.; Buffa, Anthony J.; Lou, Bo
Published by
Pearson
ISBN 10:
0-32160-183-1
ISBN 13:
978-0-32160-183-4
Chapter 19 - Magnetism - Learning Path Questions and Exercises - Exercises - Page 688: 21
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