# Where does the power dissipation go in this Thévenin equivalent?

The circuit below contains an AC current source and an ideal transformer along with some passive elements. I marked the points A and B, because I'm trying to find the power dissipated in the terminal A-B.

I could rewrite the circuit using Thévenin's theorem to this kind of circuit, where Z are complex impedances and V is a voltage source, because I feel safer calculating the power dissipation from this kind of source.

The part of the transformer on the left-hand side could be written as an impedance related to Z1 through $(N_1/N_0)^2$

Now, though, my question is: Which power dissipation in this "equivalent" circuit would be equal to the power dissipation over the A-B terminal above?

• If there's a better way to draw the diagrams, please tell me! Oct 12 '11 at 20:08
• Those are understandable, but the best way is to use your simulation or schematic software to draw it up, take a screenshot, and upload that. See this question for some example packages. Oct 12 '11 at 20:24
• Thanks @Kevin, although I was hoping for a standard ASCII way :) I used "European resistors" for impedances, is that OK? Oct 12 '11 at 20:40
• That's perfectly fine! The standard ASCII way would probably be the output of the fascinating aacircuit (Link is in German but program is internationalized). That program notwithstanding, the current circuit is much more readable than the ASCII version. Oct 12 '11 at 21:59

• Are you sure that those circuits are Thévenin equivalent? Your first circuit is A--V--R--B, which is already its own Thévenin equivalent. Oct 12 '11 at 21:18