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We have Incandescent light bulb which glow by heating its filament..But how does it maintain its temp so that it does not blow off?
asked Nov 22, 2015 in Electrical by peliant (217 points) | 40 views

1 Answer

+1 vote
When things burn, they react with oxygen and produce carbon dioxide and some quantity of energy. This process is known as combustion.
  In the case of incandescent bulb, filament (tungsten) gives off light whenever current passes through it. Since the bulb is filled with inert gases (argon or neon), which does not have free electrons or holes to react will prevent the blow off of the filament.
  Apart from this, Tungsten has very high melting point and greatest tensile strength. So the incandescent bulb maintain temperature in it's filament without blow off of filament.
answered Jan 11, 2016 by Mahesh Krishna (6 points)