A complete path through which an electric current can flow.
A substance or medium that conducts heat, light, sound, or especially an electric charge.
A flow of electric charge.
The thin wire, usually tungsten, inside a light bulb that emits light when heated to incandescence by an electric current.
An electric light that produces light with a wire filament heated to a high temperature by an electric current passing through it, until it glows.
A material that does not easily transmit energy, such as electric current or heat.
Data that can be measured, such as length, height, area, volume, weight, speed, time, temperature, humidity, sound levels, cost, members, ages, etc.