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 - Questions - Page 549: 4

Answer

a. R2. b. R1.

Work Step by Step

a. The current is the same when the lightbulbs are in series. The power equation, $P=I^{2}R$, says that the higher resistance bulb consumes more power, and burns brighter. b. The voltage is the same when the lightbulbs are in parallel. Using the power equation $P=\frac{V^{2}}{R}$, we see that the lower-resistance bulb consumes more power and burns brighter.
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