Explain why tungesten is used as filament in electric bulb?

Question

Answer

Tungsten is use as bulb filament due to following reasons,
1)having high melting point.
2)prevents from oxidation
3)good conductor of electricity
4)has low resistivity!!

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Tungsten posses high melting point and also doesn't oxidise easily so it is used as  filament of bulb

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It's because it has a high melting point and does not oxidise easily ,friend!!!!

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Tungsten is a metal, it is a good conductor of electricity. Also it is very hard and has very high melting point. Because of its high thermal stability and good conductivity properties it has many uses in electronic devices.

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Because, Tungsten doesn't melts readily at high temperature and emits the light brighter than others. It's melting point is about 3380 degree celsius.

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Tungsten is used
in electric bulb because it has high melting point and it does not oxidize

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Due to having high melting point it doesn't oxidise..

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Bulb filament material has to withstand higher operating temperature and it has to accommodate high expansion & contraction during heating & cooling. Tungsten has high melting point & very good tensile strength. Hence they are used in electric bulb.

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Tungsten as Filament in Electric Bulb

Introduction
Tungsten is widely used as a filament in electric bulbs due to its unique properties that make it ideal for this purpose. The filament is the part of the bulb that emits light when an electric current passes through it. Tungsten is a metal that possesses several characteristics that make it suitable for this application.

High Melting Point
One of the main reasons why tungsten is used as a filament in electric bulbs is its high melting point. Tungsten has the highest melting point of all metals, reaching up to 3,422 degrees Celsius. This property is essential as the filament of a light bulb must be able to withstand extremely high temperatures without melting or deforming. Other metals would not be able to withstand the heat generated by the electric current passing through the filament.

Low Vapor Pressure
Tungsten also has a low vapor pressure, which means it does not easily evaporate at high temperatures. This property is crucial for the longevity of the filament. When the filament heats up, some of the metal atoms may vaporize and deposit on the inner surface of the bulb, leading to a decrease in the brightness of the light emitted. Tungsten's low vapor pressure prevents significant vaporization, ensuring a longer lifespan for the filament and maintaining the brightness of the bulb.

High Electrical Resistance
Another important characteristic of tungsten is its high electrical resistance. The resistance of a material determines how much current it allows to flow through it when a voltage is applied. Tungsten's high resistance ensures that only a limited amount of current passes through the filament, preventing it from overheating and burning out. This allows the filament to emit a steady and controlled amount of light.

Ductility and Strength
Tungsten is a highly ductile material, meaning it can be drawn into thin wires without breaking. This property is crucial for the manufacturing process of filaments, as the tungsten wire needs to be shaped into a fine coil. Additionally, tungsten is also quite strong and can withstand the mechanical stresses and vibrations experienced by the filament during operation.

Conclusion
In conclusion, tungsten is used as a filament in electric bulbs due to its high melting point, low vapor pressure, high electrical resistance, ductility, and strength. These properties make it an ideal material for producing filaments that can withstand the high temperatures, maintain their brightness, and emit a controlled amount of light. Tungsten's usage in electric bulbs has revolutionized human lighting technology, providing us with efficient and long-lasting light sources.

Answer

Tungsten is used for making the filaments of electric bulbs because it has a very high melting point. Due to its very high melting point, the tungsten filament can be kept white hot without melting away. Also, tungsten has high flexibility and low rate of evaporation at high temperature.

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