technical direction of the current
 
 the electric circuit
 
 important circuit symbols
 
 ohm's law
 
 convention for assigning directional signs
 
 Kirchhoff voltage law (Kirchhoff law for meshes)
 
 divided circuit, parallel cicruit, conductance
 
 voltage divider
 
 simplification of networks
 
 superpositioning
 
 Thevenin's theorem (realistic electric sources)
 
- 
 
 basic ciruits        - example for series circuit: contact resistance given by (0) connection cable (ca. 10..20mOhm) (1) resistance of crimping, (2)resistance of contact body (e.g. with spring), (3) contact spring element (ca. 1mOhm). All three for male and female connector each