alternator anode armature autoconverter autostarter autotransformer battery charger brush cap capacitor cathode charger choking coil coil commutator compensator condenser controller converter coupling cutout distributor dynamo dynamotor electrode electrophorus electroscope fuse galvanic pile galvanoscope generator grid ground ignition inductor insulator interrupter jumper lightning rod magnet magneto magnetoscope motor-generator oscillator oscilloscope outlet pile plug pocket points push button reactor receptacle rectifier relay resistance box resistor rheostat self-starter selsyn shunt socket spark coil spark plug starter step-down transformer switch synchronous converter tap terminal time switch timer toggle switch transformer trickle charger voltage changer voltage regulator voltage transformer