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tritium_3
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Homework Statement
find Vx for all t
inductor assumed to have no energy stored
[PLAIN]http://img651.imageshack.us/img651/773/circuitgt.jpg
Homework Equations
inductor v = L di/dt
unit step = 1 for t>0,
= 0 for t<=0
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?
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