relay
an electric switch operated by an electromagnet
loud speaker (speaker)
device that converts electricity into sound waves
capacitor
a modern device used to store static electrical charge
xerography
an electrostatic method of reproducing images on paper
solenoid
a simple device that converts electricity to back and forth motion
DC motor
type of electric motor needs a commutator to reverse the current in the armature
Van de Graaff generator
the most common of electrostatic generator in use today
Leyden jar
an early device used to store an electric charge
incandescent lamp
device that emits light from a filament heated to extremely high temperatures
light-emitting diode
a semiconductor that emits light at a low temperature when an electric current is applied
