Why is Tungsten used for making filaments in electric lamps?
Answer: The filament of an electric lamp is made of tungsten metal because tungsten metal has a high melting point and resistivity. The metal does not melt even at high temperatures and because the resistance is high, the filament glows white due to current flow and emits light. Moreover, tungsten metal can be used to make very narrow and long wires. Hence tungsten is used in the filament of electric lamps.