Abstract :
In this survey article, we describe the following topics on electric networks in graph theoretic terms: (1) Kirchhoff´s Laws, his mesh and node equations, and his matrix tree theorem, (2) flow problems and Menger´s theorem, (3) boolean functions and enumeration and synthesis problems, (4) two-terminal networks, (5) probabilistic problems, (6) sequential machines, and (7) some unsolved problems.