Question

why tungsten is exclusively used in making filament and what is done to prolong life of filament and why​

Answer 1

Answer:

Tungsten is used in an electric bulb because it has high melting point and it does not oxidize. Thus tungsten filament does not melt even when a large amount of heat is produced due to passage of current through the filament (via heating effect of current).

Pure tungsten has properties including the highest melting point (3695 K), lowest vapor pressure, and greatest tensile strength out of all the metals. Because of these properties, it is the most commonly used material for light bulb filaments

Explanation:

Answer 2

Answer:

Answer:Tungsten is used in electric bulb because it has high melting point and it does not oxidize. Thus tungsten filament does not melt even when a large amount of heat is produced due to passage of current through the filament (via heating effect of current).