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Which metal is used for making bulb filaments? Why? What should we do to prolong the life of filament? |
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Answer» Incandescent bulbs typically use a tungsten filament because of tungsten’s high melting point. A tungsten filament inside a light bulb can reach temperatures as high as 4500˚F. A glass enclosure prevents oxygen in the air from reaching the hot filament. Tungsten has very high resistivity so it does not burn easily at room temperature.
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