What is Electrical filament?
[[File:Filament (PSF).png|thumb|193x193px|Light bulb filament]] An [[light bulb|incandescent light bulb]] has a small, thin wire with two bigger wires holding it up. This wire is called a '''filament'''. The filament is the part of the light bulb that produces light. Filaments in incandescent light bulbs are made of [[tungsten]]. Whenever an [[electric current]] goes through the filament, the filament glows. It may also be known as the electron emitting element in a [[vacuum tube]]. To make the bulb produce more light, the filament is usually made of coils of fine wire, also known as the coiled coil.{{reflist}} [[Category:Electricity]]