Uploaded October 2021 | Updated September 2026, 3 weeks ago

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Thevenin's theorem is a useful tool for creating a simplified and equivalent version of a linear, bilateral circuit. The basic idea is that you can reduce any linear bilateral circuit (ie., one with only resistors, voltage sources and current sources) down to an equivalent circuit with a single voltage source and a single series resistor.

This video describes how to use the theorem to create the simplified circuit and then goes through an example of doing that.

00:17 - Leon Charles Thevenin
00:32 - Hermann von Helmholtz
00:46 - Thevenin was a good dude (according to wikipedia)
00:54 - Definition of Thevenin's Theorem
01:08 - Definition of linear network
01:27 - Definition of bilateral network
02:22 - General description of usefulness of the theorem
04:11 - The 5 steps to apply Thevenin's theorem to get a simplified network
05:30 - An example
06:45 - R(Th) value calculation of example
08:01 - V(Th) value calculation of example
09:25 - The Thevenin equivalent of example
10:12 - Calculate the load voltage and load current of example
11:50 - Change load resistor of example to 50 Ohms.


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