Conceptual Physics (12th Edition)

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

Chapter 24 - Think and Explain: 47

Answer

There are two factors involved. First, the iron filings turns into tiny magnets because their domains align in the field. Second, if the filing is not parallel to the external magnetic field lines, a net torque acts on it and rotates it until it aligns along the field lines, just like a tiny compass needle.

Work Step by Step

This is shown in Figure 24.3.
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