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: 12

Answer

Choice A.

Work Step by Step

From the discussion on page 542 we see that to double the heart rate, the capacitor’s discharge rate must be faster. Lowering the resistance allows current to flow, discharging the capacitor faster. This makes sense because lowering R will shorten the time constant RC that determines how quickly the capacitor discharges.
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