Question

Why is tungsten used to make the filament of electric bulbs? Give any three reasons.

Answer 1

An electric bulb has a filament made of tungsten wire. Tungsten is used to make the filament of the electric bulb because of the following features:

1. It offers a large resistance so that a large amount of electrical energy is converted into a large amount of heat energy.
2. It possesses a high melting point such that it can be heated till red hot without melting.
3. Even at a high temperature of about $2500°C$, it does not get oxidized easily.