General Knowledge - General Science - Discussion

44. 

The filament of an electric bulb is made of

[A]. tungsten
[B]. nichrome
[C]. graphite
[D]. iron

Answer: Option A

Explanation:

No answer description available for this question.

Divesh D Suvarna said: (Dec 6, 2010)  
Tungsten was discovered by the Spanish brothers Fausto and Juan Jose de Elhuyar in 1783.

The Element Tungsten is defined as...
A hard, brittle, corrosion-resistant, gray to white metallic element extracted from wolframite, scheelite, and other minerals, having the highest melting point and lowest vapor pressure of any metal. Tungsten and its alloys are used in high-temperature structural materials; in electrical elements, notably lamp filaments; and in instruments requiring thermally compatible glass-to-metal seals.

Common Uses of Tungsten
Space-age super-alloys
Light bulb filaments - fluorescent lighting
Cemented carbides (also called hardmetals)
Armaments
Jewelry - Tungsten Carbide

Abcd said: (Apr 23, 2012)  
Tungsten has high melting point & resistance.

Er Zahid said: (Nov 18, 2013)  
Melting point 3800 degree.

Edward said: (Mar 16, 2014)  
Tungsten was discovered by the spanish brothers fausto and juan jose de elhuyar in 1873 the other name of tungsten is wolfram. Melting point 3800 degree.

Abcd said: (Jul 11, 2014)  
Tungsten has high melting point - 3380 C. Tungsten is used as it will help to emit more light as it has less resistance.

Umar said: (Feb 18, 2015)  
Filaments in incandescent light bulbs are made of tungsten. When electric current goes through the filament, the filament glows. It may also be known as the electron emitting element in a vacuum tube. To make the bulb produce more light, the filament is usually made of coils of fine wire, also known as the coiled coil.

Pradyumn said: (Aug 5, 2015)  
Can Nichrome be used?

Kavya said: (Aug 14, 2016)  
When electric bulb gets high electricity the tungsten metal melts and causes bulb to fuse. This prevents the bulb from further damage.

Abc said: (Feb 4, 2017)  
Tungsten has high melting point.

Bigdon said: (Dec 17, 2017)  
Tungsten can heat up to white hot state and this produces light as well as it increases the resistance of tungsten too. Therefore it is used in incandescent bulbs.

Akhila said: (Mar 8, 2018)  
Why tungsten as used in bulbs in that place? Why not other elements?

Nagaraj Banakar said: (Dec 7, 2018)  
Guys melting point of tungsten is not 3800° it is 3422° Celsius.

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