why filament of an electric bulb made of tungsten
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●Being an alloy it has a very high melting point. It has very high resistivity so it does not burn easily at room temperature. The lamp glows at high temperatures.
●Advantages of tungsten filament: (i) High melting point; (ii) High ductility; (iii)Ability to remain white hot for a very long time.
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Explanation:
Being an alloy it has a very high melting point. It has very high resistivity so it does not burn easily at room temperature. The lamp glows at high temperatures.
Advantages of tungsten filament: (i) High melting point; (ii) High ductility; (iii)Ability to remain white hot for a very long time.
Explanation:
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