- #1
hogrampage
- 108
- 1
Homework Statement
Find VL(t) and Vc(t) in the circuit below
Where Vs = cos(200[itex]\pi[/itex]t) V
Homework Equations
[itex]\alpha[/itex] = [itex]\frac{1}{2RC}[/itex]
ω0 = [itex]\frac{1}{\sqrt{LC}}[/itex]
[itex]\omega[/itex]0 = [itex]\sqrt{\omega^{2}-\alpha^{2}}[/itex]
The Attempt at a Solution
Well, I found the total capacitance
C = 1.5 uF
Then, I found [itex]\alpha[/itex]:
[itex]\alpha[/itex] = [itex]\frac{1}{2(100Ω)(1.5uF)}[/itex] ≈ 3333 s-1
and
ω0 = [itex]\frac{1}{\sqrt{(20mH)(1.5uF)}}[/itex] ≈ 5774 s-1
So Vc = B1e-3333cos([itex]5774\pi[/itex]t) + B2e-3333sin([itex]5774\pi[/itex]t)
That's as far as I went. I have no idea what I'm doing :|. Also, please note that I have NOT had differential equations. This class does not require it, so please give an answer without using DQ's.