Physics Technology Update (4th Edition)

Published by Pearson
ISBN 10: 0-32190-308-0
ISBN 13: 978-0-32190-308-2

Chapter 24 - Alternating-Current Circuits - Problems and Conceptual Exercises - Page 871: 76

Answer

Please see the work below.

Work Step by Step

We know that the capacitve reactance $ X_C=\frac{1}{\omega C}$ and the inductive reactance is given as $ X_L=\omega L $. It is given that the circuits are connected to a battery that is a dc source, which means $\omega=0$. Now $ X_L=0\times (L)=0\Omega $ and $ X_C=\frac{1}{0\times C}=\infty $. Thus, the inductor behaves as an ideal wire and the capacitor breaks the circuit. The effective resistance of the circuit is $\frac{R}{2}$ and we conclude that the current in the figure (24-30) is greater than the current in the figure (24-31).
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