Conceptual Physics (12th Edition)

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

Chapter 23 - Think and Explain: 107

Answer

A fuse wired in series with the lamp, in series with the heater, or in series with the toaster would be useful.

Work Step by Step

Such a fuse would blow/melt and stop the current if something went wrong with that one appliance. Some devices do indeed have their own built-in fuses for just that reason.
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