Topic: Tungsten Filament
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What is thoriated tungsten filament?
( ′thör·ē′ād·əd ¦təŋ·stən ′fil·ə·mənt ) (electronics) A vacuum-tube filament consisting of tungsten mixed with a small quantity of thorium oxide to give improved electron emission. Also known as thoriated emitter. Read More »
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What is tungsten filament?
( ′təŋ·stən ′fil·ə·mənt ) (electricity) A filament used in incandescent lamps, and as an incandescent cathode in many types of electron tubes, such as thermionic vacuum tubes. Read More »
Source: http://www.answers.com/topic/tungsten-filament
Who invented the tungsten filament lamps?
Thomas Edison It was actually Irving Langmuir (of General Electric), also an American. Edison's incandescent lamp used a carbon filament, as did that of his contemporary, England's Joseph Swan who got there before Edison (who invented a lon... Read More »
Source: http://wiki.answers.com/Q/Who_invented_the_tungsten_filament_lamp...
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Tungsten Filament
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as it has a high melting point and retains its strength in temperature extremes .
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Source: http://wiki.answers.com/Q/Why_is_tungsten_used_in_the_filament_of...
the only metal that will light up in the whole world is the tungsten so they uses the tungsten for the light bulb filaments.
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Source: http://wiki.answers.com/Q/Why_is_tungsten_used_for_lightbulb_fila...
Tungsten is used because it has a high melting point and retains its strength in temperature extremes.
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Source: http://wiki.answers.com/Q/Why_is_tungsten_used_in_light_bulb_fila...
the reason that tungsten is better then carbon for light filaments is because the melting point is higher,. the melting point of carbon is only 3550, as where tungstens melting point is 3695
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Source: http://wiki.answers.com/Q/Why_is_tungsten_better_than_carbon_for_...
A tungsten filament does follow Ohm's Law at any instant of time. You may be confused in that the filament resistance changes from its "cold" state to its "hot" state. When cold the resistance is about 1/15 the resistance of what it is when...
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Source: http://wiki.answers.com/Q/Why_tungsten_filament_does_not_obey_ohm...
Because when heated, copper would react with the oxygen in the air and oxidise. Tungsten is not as reactive (I think, but check). I think Argon can also be used as a light bulb filament.
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Source: http://wiki.answers.com/Q/Why_the_filament_of_a_bulb_is_made_of_t...
