# RLC circuits problem

1. Jul 21, 2010

### oso0690

Hello everybody,

So I've been on this problem for nearly 4 hours now and am still blank at what i need to do as this book only has 2 RLC circuit examples that are not helping.

Code (Text):

--R1-----R2--
|      |      |
Vs     L      C
|      |      |
-------------

(well...this diagram didn't work well... basically, the Vs, L and C are parallel to each other with the L between the reistances and the Vs and C on the outsides.)
Vs = 10 + 30u(t) V, R1 = 50 Ohms, R2 = 20 Ohms, L = 10 H, C = 4 F

relevent equations: V = IR, I = C*v', L = I'

By using meshes, I am able to get the following 2 equations:

10i' + 50i = vs + 10j'

and

10j' + 20j = -vc + 10i'

where i is the current in the first mesh, j is the current in the second mesh. I'm trying to find the currents through the resistances and the voltages through the capacitance and inductance.

What do I do now? I figure I can turn the j currents into vc but that would leave i and i'.

Last edited by a moderator: Jul 21, 2010