Conceptual Physics (12th Edition)

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

Chapter 23 - Think and Rank: 53

Answer

Ammeter readings: A = B = C.

Work Step by Step

The 3 bulbs are in parallel, and have the same voltage across them. For two or more devices connected in parallel, the voltage is the same across each device. This is Rule 1 for parallel circuits, on page 444, and discussed on pages 443-444. Because the bulbs are identical, and the voltages are the same, the current through each is identical.
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