Thevenin Voltage Is Open Circuit Voltage. This is the open circuit voltage of the imaginary source. We take this resistance in series with the voltage source.
Thevenin s equivalent circuit of an open circuit voltage or thevenin voltage vth and the total resistance from the side of the open terminal thevenin s equivalent resistance rth. On the other hand the equivalent resistance of the circuit between the ports is thevenin s resistance. In the open circuit condition the lack of a load resistor rl results in infinite resistance or the thevenin equivalent voltage vth.
This is the open circuit voltage of the imaginary source.
Any combination of batteries and resistances with two terminals can be replaced by a single voltage source e and a single series resistor r. Mathematically it can be done by replacing the individual sources with their internal resistance. Connected both thevenin s quantities in series. Thevenin s theorem states that a linear two terminal circuit can be replaced by an equivalent circuit consisting of a voltage source v th in series with a resistor r th where v th is the open circuit voltage at the terminals and r th is the input or equivalent resistance at the terminals when the independent sources are turned off.
