Test Source Method to find Thevenin's Impedance

Network theorems are propositions developed to so solve electrical circuits. Thevenin’s and Norton’s theorems in particular, are very useful in finding current in load branch for different loads. Also, both theorems will be used while solving networks for maximum power transferred across the load.

In such conditions, finding Thevenin’s impedance becomes mandatory. Therefore, very easy method called “Test source method” is explained in this tutorial. Both Voltage test source and current test source methods are dealt.

Typical examples are solved to clarify some key issues required to be known. I hope, this tutorial will be helpful for both teachers and students engaged in teaching and learning Network Analysis.