Conceptual Physics (12th Edition)

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

Chapter 24 - Think and Explain: 63

Answer

See below for 2 possibilities.

Work Step by Step

First, one could put a bar magnet in the room and see what happens. Does it align with a magnetic field? Second, one could put a stationary electric charge in the room. A magnetic field exerts no force on a stationary charge. This is stated on page 460. However, in an electric field E, a charge q feels a force of magnitude $q \times E$. A stationary charge will be set into motion.
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