Never stop learning : Tungsten and resistance

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  • capwizard
    Badcaps Legend
    • Jun 2016
    • 1991
    • USA
    #1

    Never stop learning : Tungsten and resistance

    Never stop learning series : Tungsten and resistance

    In this video did get me. First it look like a magic to me, then I recall that is cause by the Resistance. How about you guys?

    https://www.youtube.com/watch?v=_1tCRnl1Nfo
    Light bulb mystery- electric resistance // Homemade Science with Bruce Yeany

    Light bulb filament
    https://www.youtube.com/watch?v=DIGqBb3iZPo

    The name "tungsten" (from the Swedish tung sten, "heavy stone")

    For a 60-watt 120-volt lamp, the uncoiled length of the tungsten filament is usually 22.8 inches (580*mm), and the filament diameter is 0.0018 inches (0.046*mm).

    The cold resistance of tungsten-filament lamps is about 1/15 the hot-filament resistance when the lamp is operating

    Carbon filament bulbs have the opposite characteristic. The resistance of a carbon filament is higher when it is cold than when it is operating.

    No1 producer of Tungsten is China.

    Tungsten is the metal with the highest melting point, 3,695*K (6,191*°F)
    Last edited by capwizard; 12-06-2016, 01:02 PM.
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