Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)

Published by Pearson
ISBN 10: 0321740904
ISBN 13: 978-0-32174-090-8

Chapter 35 - AC Circuits - Conceptual Questions - Page 1051: 4

Answer

(a) $f_c = 100~Hz$ (b) $f_c = 100~Hz$ (c) $f_c = 200~Hz$

Work Step by Step

We can write an expression for the crossover frequency: $f_c = \frac{1}{2\pi~R~C}$ (a) If the resistance is doubled then $f_c$ is decreased by a factor of $\frac{1}{2}$ $f_c = 100~Hz$ (b) If the capacitance is doubled then $f_c$ is decreased by a factor of $\frac{1}{2}$ $f_c = 100~Hz$ (c) The crossover frequency does not depend on the peak emf. $f_c = 200~Hz$
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