Explain the following: (i) Why is tungsten used almost exclusively for filament of electric lamps ?
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Explanation:
The metal tungsten is almost exclusively used for the filament of the electric lamp because it has a very high melting point due to which it does not melt even when it is heated to high temperatures due to the passage of electric current.
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1
Explanation:
The melting point and resistivity of Tungsten are very high. At high temperatures, it does not burn quite well. The temperature of the electric lamps is extremely high. Hence, tungsten is mainly used as the heating element of electric bulbs. Tungsten has a very high melting point and very high resistivity so does not burn easily at a high temperature.
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