Thevenin’s Theorem statement:
Statement for DC
Thevenin’s theorem states that any two terminal linear network having number of voltage sources, current sources and resistances can be replaced by a simple equivalent circuit consisting of a single voltage source, Vth in series with a resistance Rth. Whereas the value of the voltage source, Vth is the
open circuit voltage across the two terminals of the network called as the thevenin’s voltage and the thevenin’s resistance, Rth is the equivalent resistance measured between the terminals when all independent sources are turned off; i.e the independent ideal voltage source is replaced by a short circuit and ideal current source with open circuit.
open circuit voltage across the two terminals of the network called as the thevenin’s voltage and the thevenin’s resistance, Rth is the equivalent resistance measured between the terminals when all independent sources are turned off; i.e the independent ideal voltage source is replaced by a short circuit and ideal current source with open circuit.
Statement for AC
Thevenin’s theorem states that any two terminal linear network having number of voltage sources, current sources and impedances can be replaced by a simple equivalent circuit consisting of a single voltage source, Vth in series with an impedance Zth. Whereas the value of the voltage source, Vth is the open circuit voltage across the two terminals of the network and the thevenin’s impedance, Zth is the equivalent impedance measured between the terminals of the networks when all independent sources are turned off.
Thevenin’s Equivalent
The below figures show the thevenin’s equivalent circuit.
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| Thevenin's equivalent circuit for DC |
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| Thevenin's equivalent circuit for AC |
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