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So I watched a couple videos on Youtube about Thevenin's theorem and I found 2 ways to do this circuit,but I get two different answers and I'm confused now.(for finding \$V_{th}\$) First method is

\$V_{th} = (V_s/R_1+R_2)R_2\$ and i get 24 V

The second method is using KCL so, \$I_1-I_2+I_3=0\$ and I get \$V_{th}\$ = 30V

are both ways right and I'm just calculating wrong or I can't use method 1 for this circuit. Can someone explain please.

picture of a hand-drawn circuit

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  • \$\begingroup\$ They should definitely give you the same answer. \$\endgroup\$ – jDAQ Jun 3 '20 at 18:58
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I recommend you use Thévenin's and Norton's theorem in each of the elements instead. Start from your circuit, and apply Norton to the 32V supply and the 4 Ohms resistors.

schematic

simulate this circuit – Schematic created using CircuitLab

Then add the two current supplies and find the parallel equivalent of the 4 and 12 Ohms resistors (which is 3 Ohms).

schematic

simulate this circuit

Now all you have to do is apply Thévenin again and you pretty much have your answer.

schematic

simulate this circuit

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