Conductors of Electrical Energy Another type of energy that can move through some materials is electrical energy.
For example, when the cord on the lamp in the picture is plugged in, it must be made of an electrical conductor in order for the light bulb to light up.
Most cords have copper wires inside of them, since copper is a good conductor of electricity.
Common conductors of electrical energy include:
Electrical Insulators Electrical insulators keep electricity from passing through them.
For example, most electrical cords have copper wires inside of them, but they are covered rubber or plastic so that they can safely be touched, even when they are carrying electricity.
Common electrical insulators include: