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Electric Bulb

The filament ...

Question

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.

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