College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300



College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

The circuit in Figure P18.62 contains two resistors, R1 = 2.0 kΩ and R2 = 3.0 kΩ, and two capacitors, C1 = 2.0 μF and C2 = 3.0 μF, connected to a battery with emf ε = 120 V. If there are no charges on the capacitors before switch S is dosed, determine the charges q1 and q2 on capacitors C1 and C2, respectively, as functions of time, after the switch is closed. Hint: First reconstruct the circuit so that it becomes a simple RC circuit containing a single resistor and single capacitor in series, connected to the battery, and then determine the total charge q stored in the circuit.


Figure P18.62

To determine
The ammeter and voltmeter readings of the circuit.


Given Info:


The circuit is,

The potential at the point d is,


The potential at the point e is,


In the above figure, all the points mentioned as a are equal potentials and all the points named as c are also equal potentials.

In the path ecd,

Formula to calculate the voltmeter reading is,


  • Vd is the voltage at d
  • Ve is the voltage at e

Substitute 6.0V for Vd and 4.50V for Ve to find the voltmeter reading,


Thus, the voltmeter reading is 1.50V .

The circuit is,

Apply Kirchhoff’s loop rule in the loop abcfa in the above figure,


Re-write the above expression,

I3=I (I)

Apply Kirchhoff’s loop rule in the loop abcda in the above figure,


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