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 - General Problems - Page 558: 97

Answer

$V_1=11.48V$ $V_2=6.26V$ $V_3=5.22V$ $Q_1=11.5\mu C$ $Q_2=12.5\mu C$ $Q_3=12.5\mu C$

Work Step by Step

$Q=CV$ $Q_{total}=(1.0\mu F)(24V)=24\mu C$ $Q_2=Q_3$ $C_2V_2=C_3V_3$ $V_2=\frac{C_3V_3}{C_2}=1.2V_3$ $V_1=V_2+V_3=2.2V_3$ $Q_{total}=Q_1+Q_2$ $24\mu C=(1\mu F)V_1+(2\mu F)(0.55V_1)$ $V_1=11.48V$ $V_3=5.22V$ $V_2=6.26V$ $Q_1=C_1V_1=(1.0\mu F)(11.48V)=11.5\mu C$ $Q_2=C_2V_2=(2.0\mu F)(6.26V)=12.5\mu C$ $Q_3=C_3V_3=(2.4\mu F)(5.22V)=12.5\mu C$
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