Why is the tungsten used almost exclusively for filament of electric lamps?



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.

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CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo