I'm currently stuck at an assignment where I have to calculate the Thevenin voltage for a circuit. I know how to do this for simpler circuits, but this one was too much for me to handle. I calculated the Thevenin resistance to be 5.2Ω, which I know is the correct solution. If someone could enlighten me to how I can find the Thevenin voltage I'd be grateful. A step by step guide would really make me happy


http://image-upload.de/image/JMLEeZ/4f097e0b9b.jpg

 

Use mesh analysis (loop analysis) to find the current in each loop. There is an example of how to do that here:
http://forum.allaboutcircuits.com/showthread.php?p=108579#post108579

Once you have determined the current in the loop where R5 is, just use Ohm's Law to find the V drop across R5. That's your V(thev).

 

I appreciate your help. The problem is that the mesh-current method is not a part of our curriculum. So, basically we have to use another method to solve this. I've tried using the node-voltage method, which I assume is intended, but I'm not quite sure how to do it on this particular circuit.

 

I'm currently stuck at an assignment where I have to calculate the Thevenin voltage for a circuit. I know how to do this for simpler circuits, but this one was too much for me to handle. I calculated the Thevenin resistance to be 5.2Ω, which I know is the correct solution. If someone could enlighten me to how I can find the Thevenin voltage I'd be grateful. A step by step guide would really make me happy

Maybe the Vth could be easily found as part of finding Rth. Show how you obtained the Thevenin resistance, and we'll offer help with the rest.

 

It's quite possible to use node analysis as well - you'll find the voltage on R5 right away.
You have 3 nodes there, which means 3 equations. If you have a nice calculator you can solve them quickly.

Oh, "not a part of our curriculum" - make it a part of your curriculum then. Loop analysis is a very good and easy technique, and you'll miss a lot if you don't learn it.

Oh, more info on analysis:
http://www.youtube.com/watch?v=2vHGYdepKLw
http://www.youtube.com/watch?v=RsJ1eg7XNVs
Good stuff

 

Thanks managed to solve it using the node voltage method.