Thevenin Equivalent Resistance. The input resistance or equivalent resistance of the dead circuit at terminals a b in figure. 1a must be equal to rth in figure.
1a must be equal to rth in figure. Thevenin s theorem states that it is possible to simplify any linear circuit no matter how complex to an equivalent circuit with just a single voltage source and series resistance connected to a load. The thevenin resistance is the resistance looking back from ab with v 1 replaced by a short circuit.
Thévenin equivalent circuit represents a general circuit in a form of an independent voltage source vth with a since resistance rth.
To find vth and rth first we assume that the load resistor is infinite. Replacing a network by its thevenin equivalent can simplify the analysis of a complex circuit. Thevenin s theorem states that it is possible to simplify any linear circuit no matter how complex to an equivalent circuit with just a single voltage source and series resistance connected to a load. 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.
