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Why is the tungsten used almost exclusively for filament of electric lamps?
Answer
Tungsten metal is used exclusively for making the filament of electric bulbs because it has a very high melting point.
Due to its high melting point, the tungsten filament can be kept white hot without melting away.
Other reasons for using tungsten are
- It is highly flexible
- It has a low rate of evaporation at high temperature.
