Summary Notes on electricity

Included in these notes are the key definitions (e.g. emf, resistivity) as well as the explanations for how current voltage and resistance vary with each other in components such as diodes, filament lamps, and thermistors. A description of the resistivity is given as well as how temperature affects the resistance of a metal. The meaning of a superconductor is given as well as some of its uses. In addition, the rules and differences for calculating current, voltage, and resistance for series and parallel circuits are given. Furthermore, the uses of potential divider circuits are given as well as descriptions of the electromotive force(emf) and internal resistance within a cell. Finally, the equations relevant to this topic are given including some not on the formula sheet provided.