Thevenin Equivalent Resistance. Thevenin s theorem states that any linear network having a number of voltage sources and resistances can be replaced by a simple equivalent circuit consisting of a single voltage source v th in series with a resistance r th where v th is the open circuit voltage at the terminals of the load and r th is the equivalent resistance measured across the terminals while independent sources are turned off. Thevenin equivalent resistance is the resistance measured through the two points of the terminal after all internal voltage sources are replaced with a short and all internal current sources are replaced with an open.
1a must be equal to rth in figure. Thus we can say that the norton current is equal to the thevenin voltage divided by the thevenin resistance. In this example the thevenin voltage is just the output of the voltage divider formed by r 1 and r 3.
Thevenin s theorem states that any linear network having a number of voltage sources and resistances can be replaced by a simple equivalent circuit consisting of a single voltage source v th in series with a resistance r th where v th is the open circuit voltage at the terminals of the load and r th is the equivalent resistance measured across the terminals while independent sources are turned off.
The measured or calculated equivalent resistance of the circuit across the terminals is called thevenin equivalent resistance. The measured or calculated equivalent resistance of the circuit across the terminals is called thevenin equivalent resistance. Thevenin equivalent resistance is the resistance measured through the two points of the terminal after all internal voltage sources are replaced with a short and all internal current sources are replaced with an open. Replacing a network by its thevenin equivalent can simplify the analysis of a complex circuit.
