Conceptual Physics (12th Edition)

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

Chapter 23 - Think and Explain: 82


See below.

Work Step by Step

In a home, electric power is almost always alternating current, ac (in the United States, at a frequency of 60 Hz and 110-120 V). A car battery supplies a steady voltage and drives current in one direction. In the headlight, one would expect direct current, dc.
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