Engineering Problem understanding Thévenins equivalent circuit

AI Thread Summary
The discussion revolves around understanding Thévenin's equivalent circuit, specifically a problem illustrated in a shared image. Participants express confusion about the calculations, particularly the factor of I1 in the equation for short-circuit current I(SC). A suggestion is made to use mesh analysis by setting up equations for two loops: one with the voltage source and components A and C, and another with components A, B, and E. By equating these equations, the voltage source can be eliminated to simplify the problem. The conversation emphasizes the importance of careful equation setup in solving Thévenin's equivalent circuit problems.
Pellefant
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Problem understanding "Thévenins equivalent circuit "

The problem is illustrated in the picture below.

http://img266.imageshack.us/img266/5422/thevininprobxn1.jpg

I am not sure i understand this so well either, any comments are appriciated.

Best regards

Pellefant
 
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Your answers are missing a factor of I1.

How did you get I(SC) = (B+E)I1/(C+B+E) ?

To get the answer just consider the mesh equation equations set up for the loop on the left with the voltage source, A and C in clockwise. Then, remembering that D is shorted, set up another mesh equation with the voltage source, A, B, E clockwise. Equate the two equations to eliminate the voltage source and you're done.
 

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