Q606
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
AnswerAnswer: Option D
Solution
Answer: 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).