Hello

so i have this circuit and I need to determine the Thevenin Voltage between point A and B and the thevenin restistance, so that I can determine the current throught the load resistor.

I already determined the current ( 300 mA) with the nodal method, but I don't know how to do it with thevenin. I tried several times, but with no succes.

 

hi,
Perhaps this link will help.
http://www.allaboutcircuits.com/vol_1/chpt_10/8.html

 

Surely your textbook has examples of how to find Thevenin voltage and resistance.

 

Yes I do I have a step by step way described in my book, but even tough I follow it. I can't get the results, for this problem. Other exercises on thevenin went fine.

 

So show your work so that we can see what you are doing right and what you are doing wrong. Just present your best effort to solve your homework so that we have something to start from.

 

Hey
The thevenin's equivalent resistance is zero!!

 

Although the OP is pretty clearly long gone, please don't just provide answers to people's homework problems. That's not what this forum is about.

 

Hey
The thevenin's equivalent resistance is zero!!

Hey
How did you come up with that?

 

Hey
How did you come up with that?

Considering that terminals A and B are connected direction across a two series-connected voltage sources....

 

Considering that terminals A and B are connected direction across a two series-connected voltage sources....

I'm blind. Missed the other voltage source on the left.

 

Sorry I know it has been a long time. Actually it is not a homework problem, it was a question from a test. My problem with thevenin is that I don't know what to do when they ask for a voltage or current in the middle of the circuit. But here is one of my countless tries

 

You are doing a source transformation that is meant to convert a current source that is in parallel with a resistance into a voltage source that is in series with a resistance. But that is not what you have -- you have a voltage source in parallel with a resistance.

Take a look at this thread -- it may help.

http://forum.allaboutcircuits.com/threads/thevenin-equivalent-problem-need-help-how-to-solve.105075/