how is filament in the bulb formed
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The filament is the part of the light bulb that produces light. Filaments in incandescent light bulbs are made of tungsten. When electric current goes through the filament, the filament glows. ... To make the bulb produce more light, the filament is usually made of coils of fine wire, also known as the coiled coil.
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it is made up of TUNGSTEN whose symbol is W
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