# Thevenin equivalent theorem in phasor domain

Discussion in 'Homework Help' started by nyasha, Dec 9, 2010.

1. ### nyasha Thread Starter Active Member

Mar 23, 2009
90
2
I have attached both the question and my attempt to the solution. Can someone please tell me if l am correct or not ?

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2. ### jegues Well-Known Member

Sep 13, 2010
732
45
I'm fairly certain that's not correct.

Try taking a more conservative approach. You have two loops, and 3 nodes. One of the loops has a current source in it.

This screams mesh analysis, because you instantly know one of the mesh currents. (i.e. i1 = -Is)

You can solve the current in the top loop with your mesh equation, then simply write a KVL in the big "outer loop".

Since you know the current in the top loop, you know the voltage across the 2Ω resistor.

I found Voc to be,

$\frac{148 - j12}{13}$

Good luck!

3. ### Georacer Moderator

Nov 25, 2009
5,154
1,281
Some pointers:

The inductor's impedance is dependant on the frequency, much like the capacitor. Its impedance is Zi=jωL

In your place I wouldn't assume that Z2's frequencey is 1000rads. It may be true but you can't prove it at this point.

Keep the vector notation of the sources inside the calculations.