Physics
Grade-7
Easy
Question
Tungsten is used for the manufacture of an electric bulb because
- It is inexpensive
- It is malleable
- It is a good conductor
- It has a very high melting point
Hint:
It has a very high melting point
The correct answer is: It has a very high melting point
Tungsten is used in due to high melting point and resistivity and does not oxidize. Thus, the filament of tungsten does not melt even though a large amount of heat is generated due to the passage of the current to through the filament.
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