In filament lams, filament is made up of?
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Explanation:
The filament is the part of the light bulb that produces light. Filaments in incandescent light bulbs are made of tungsten
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《tungsten wire》
Incandescent light bulbs consist of an air-tight glass enclosure (the envelope, or bulb) with a filament of tungsten wire inside the bulb, through which an electric current is passed.
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