46. Tungsten is used for the manufacture of the filament of an electric bulb, because A.It is a good conductor B.It is economical C.It is malleable D.It has a very high melting point
Option D Solution: 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).
