The quantity of electricity that can be delivered from a unit, as from a battery in ampere hours, or output from a generator, etc. Carbon pile A device to vary the resistance and, consequently, the current in an electrical circuit. An electrical system in which all positive terminals are joined through one wire, and all negative terminals through another wire. An electrical system in which separate parts are connected end to end, to form a single path for current to flow through. An electrical circuit in which there is no interruption of current flow.
Circuit breaker Uses a heat-sensitive spring to break contact in an overload condition.
Automotive circuit breakers will reset to close the circuit when they cool off. Circuit protector A circuit protector is a device that will open the circuit if it becomes overheated because of too much electricity flowing through it. Thus it protects other components from damage if the circuit is accidentally grounded or overloaded. Fuses, fusible links and circuit breakers are circuit protectors. Coil A continuous winding arrangement of a conductor which combines the separate magnetic fields of all the winding loops to produce a single, stronger field.