Laplace transforms: R series with RC parallel circuit: Difference between revisions

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===Problem Statement===
===Problem Statement===



Find the Voltage across the capacitor for t>=0:
Find the Voltage across the capacitor for t>=0:
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Voltage across capacitor at t(0-)=0
Voltage across capacitor at t(0-)=0


v(t0)=0 Volts


v(t)=10 Volts
: <math>v(t0)=0 Volts</math>


: <math>v(t)=10 Volts</math>
R1=20 Ohm
: <math>R_1=20 \boldsymbol{\Omega}</math>


: <math>R_2=30 \boldsymbol{\Omega}</math>
R2=30 Ohm


C=.1 Farad
: <math>C=.1 Farad</math>




Loop 1
Loop 1


<math>v(t)=R1(i1+i2)+R2(i1)</math>
:<math>v(t)=R1(i_1+i_2)+R2(i_1)</math>


<math>10=20(i1+i2)+30(i1)</math>_______________________________________equation (1)
:<math>10=20(i_1+i_2)+30(i_1)</math>_______________________________________equation (1)




Loop 2
Loop 2


<math>v(t)=R1(i1+i2)+\dfrac{1}{C}\int{i2 dt}</math>
:<math>v(t)=R1(i_1+i_2)+\dfrac{1}{C}\int{i_2 dt}</math>


<math>10=20(i1+i2)+\dfrac{1}{0.1}\int{i2 dt}</math>_______________________equation (2)
:<math>10=20(i_1+i_2)+\dfrac{1}{0.1}\int{i_2 dt}</math>_______________________equation (2)





Revision as of 23:26, 20 October 2009

Problem Statement

Find the Voltage across the capacitor for t>=0:

Voltage across capacitor at t(0-)=0



Loop 1

_______________________________________equation (1)


Loop 2

_______________________equation (2)



Solving equations (1) and (2) simultaneously


Laplace Transform S-domain


Inverse Laplace transform T-domain


Voltage on Capacitor