Why is tungsten metal selected for making filaments of incandescent lamp bulb
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- to produce light more amount of heat is required.
- when we use metal's with low melting point it may melts
- but tungsten wire have highest melting point
- that is =3422°c
- hence it use for making filament of bulb
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The filament of an electric bulb is usually made of tungsten, because of its higher resistivity value
(5.56 ×10^-8 Ωm) and its highmelting point (3422°c).
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