**Thevenin's theorem** for

electrical networks states that any combination of

voltage sources and

resistors with two terminals is electrically equivalent to a single voltage source

**V** and a single series resistor

**R**. The theorem was first discovered by German scientist

Hermann von Helmholtz in 1853, but was then rediscovered in 1883 by French telegraph engineer M. L. Thévenin (

1857-

1926).

See also: Norton's theorem.

All Wikipedia text
is available under the
terms of the GNU Free Documentation License