Conceptual Physics (12th Edition)

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

Chapter 24 - Reading Check Questions (Comprehension) - Page 466: 16

Answer

The magnetic domains in the iron align with the external magnetic field. The field of the aligned iron atoms adds to that of the original external field, making it even stronger.

Work Step by Step

This is the principle behind electromagnets, and is discussed on page 459.
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