Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 19 - DC Circuits - Misconceptual Questions: 8

Answer

Choice A.

Work Step by Step

When the switch is closed, the effective resistance of the parallel resistors becomes smaller. This combination is in series with R1 and the battery, and the circuit’s entire resistance gets smaller. A greater current flows through the battery, and through R1. This results in a larger voltage drop across R1.
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