The filament of an electric bulb is of tungston because
A
Its resistance is negligible.
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B
It is cheaper.
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C
Its melting point is high.
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D
Filament is easily made.
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Solution
The correct option is C Its melting point is high. Tungston has very high melting point. Thus it does not melt even when a large amount of heat is produced in the bulb due to heating effect of current. Hence it is used as a filament in the bulb.