Created at: 2025-11-19
If you need to make a partial analysis of a circuit, for example, defining the current/voltage/power delivered to a single "load" resistor by the remainder of the circuit (which can be fairly complex), and perhaps you want to find the response for different values of the load resistor, thevenin theoram tells you that it is possible to replace everything except the load resistor with an independent voltage source in series with a resistor. Or if you are using the Norton equivalent, an independent current source with a parallel resistor.