Question

The metal used for making filaments of an electric bulb is _______.

Answer 1

1. The metal tungsten is almost solely used for electric lamp filaments because it has a high resistivity and a very high melting point, which means it does not melt even when heated to high temperatures by electric current.
2. It has an extremely high melting point since it is an alloy.
3. Because of its high resistivity, it does not easily burn at normal temperatures.
4. The lamp burns brightly at high temperatures.

Hence the metal used for making filaments of an electric bulb is tungsten.