Thevenin's Theorem
Thevenin's Theorem is an analytical method used to change a complex circuit into a simple equivalent circuit consisting of a single resistance in series with a source voltage.
Thevenin's theorem states that " a linear, active and passive two terminal circuit can be replaced by an equivalent circuit consisting of a voltage source VTh in series with a resister RTh
where,
VTh is open circuit voltage at the terminals
RTh. is the input/equivalent resistance at the terminals
when independent source are turned off."
Basic procedure for solving circuit using Thevenin's Theorem:
- Remove temporarily the local resister RL
- Find RTh by shorting all voltage source and by open circuiting current sources.
- Find VTh by general circuit analysis.
- Find current flowing through the load resister RL as
For example click Thevenin's theorem example
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