7.23 The switch in the circuit in Fig. P7.23 has been in the left position for a long time. At t = 0 it moves to the right position and stays there. a) Write the expression for the capacitor voltage, v(t), for t > 0. b) Write the expression for the current through the 40 kN resistor, i(t), for t > 0*. Figure P7.23 5 kΩ 40 k2 t = 0 + 120 V 10 kΩ 160 nF 25 kN 10 kM

7.23 The switch in the circuit in Fig. P7.23 has been in the left position for a long time. At t = 0 it moves to the right position and stays there. a) Write the expression for the capacitor voltage, v(t), for t > 0. b) Write the expression for the current through the 40 kN resistor, i(t), for t > 0*. Figure P7.23 5 kΩ 40 k2 t = 0 + 120 V 10 kΩ 160 nF 25 kN 10 kM

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Concept explainers

Sinusoids And Phasors

Sinusoids are defined as the mathematical waveforms that are used to describe the nature of periodic oscillations.

Circuit Theory

Electric circuits are a network that comprises of a closed-loop, which helps in providing a return path for the current through a switch. When the switch is activated, the load operates, and the current accepts a path to finish the circuit at a low potential level from the opposing high potential level. Electric circuits theory is a linear analysis that helps in establishing a linear relation of voltage and current for R (resistance), L (inductance), and C (capacitance).

Question

7.23 The switch in the circuit in Fig. P7.23 has been in the
left position for a long time. At t
right position and stays there.
O it moves to the
a) Write the expression for the capacitor voltage,
v(t), for t > 0.
b) Write the expression for the current through the
40 kN resistor, i(t), for t > 0*.
Figure P7.23
5 ΚΩ
40 kΩ
t = 0
120 V
10 kΩ
160 nF
{25 k
ξ10 kΩ
7.44 The switch in the circuit in Fig. P7.44 has been open
a long time before closing at t = 0. Find i,(t)
PSPICE
MULTISIM for t > 0.
Figure P7.44
40 mH
20 Ω
40 N
i,(t)
+ Vý
t = 0
50 Ωξ
>0.1v
310 N
{15 N
1 )10 A
140 V

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