Class 10 Exam > Class 10 Questions > Electric bulb filament is made ofa)Copperb)Al...
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Electric bulb filament is made of
- a)Copper
- b)Aluminum
- c)Lead
- d)Tungsten
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Electric bulb filament is made ofa)Copperb)Aluminumc)Leadd)TungstenCor...
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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Electric bulb filament is made ofa)Copperb)Aluminumc)Leadd)TungstenCor...
Because, Tungsten cannot melts readily at high temperature. It's melting point is about 3380 degree celsius and emits more light brightly. Whereas, Copper, Aluminium and Lead can melts readily at high temperature. For this sake, the electric bulb filament is made up of Tungsten.
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Community Answer
Electric bulb filament is made ofa)Copperb)Aluminumc)Leadd)TungstenCor...
There is a lot of heat dissipated inside an electric filament. So, the filament need to be made out from a metal which has a very high boiling point so that the filament will not melt even though the bulb is used for a long time. Tungsten (whose boiling pint is around 5500 degrees Celsius) is the best suited for this purpose.
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Electric bulb filament is made ofa)Copperb)Aluminumc)Leadd)TungstenCorrect answer is option 'D'. Can you explain this answer?
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