(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

find Vx for all t

inductor assumed to have no energy stored

[PLAIN]http://img651.imageshack.us/img651/773/circuitgt.jpg [Broken]

2. Relevant equations

inductor v = L di/dt

unit step = 1 for t>0,

= 0 for t<=0

3. The attempt at a solution

using node voltage method, ground at the bottom, and "v1" for the top node

v1 = Ldi/dt ?

(v1 - .8 vx)/40 - 100u(t) + v1/60 = 0

2.5 v1 - 1.2Vx = 6000 u(t)

i fail.

Help anyone?

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: RL circuit with dependent voltage source and indep. current source with unit step

**Physics Forums | Science Articles, Homework Help, Discussion**