Question

Thevenin's Theorem. "Any two-terminal, linear bilateral DC network can be replaced by an equivalent circuit consisting of a voltage source and a series resistor."This means that a circuit such as the one in Figure 1 can be replaced by a power supply and a series resistor, allowing for a quicker analysis of changes in load resistance,(RO) R3 Figure 1 Some of the advantages offered by this theorem are: • It allows the determination of any given voltage or current in a linear network with one, two or any number of power supplies. It allows the analysis of a specific part of a network, substituting the remaining network with an equivalent circuit Procedure for theorem application. 1. Remove the part of the network through which the equivalent Thevenin's circuit will be analyzed (in the illustration above, it would be RL.), and label the network terminals where the removed element was located. 2. Calculate Thevenin's Resistance Rth substituting all supplies by zero (current supply sources are replaced by open circuits and voltage supply sources are replaced by short circuits) and find the resulting resistance between the two labeled terminals. yn 3. Calculate Thevenin's voltage Et returning all power supply sources to their original settings and finding the voltage of the open circuit between the tagged terminals. 4. Draw Thevenin's equivalent circuit, adding the circuit part removed before. This step is indicated by placing the Ri resistor between the Thevenin equivalent circuit terminals.

Answer 1

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