Question

why is tungsten used exclusively for filament of electric lamp ?

Answer 1

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Q. Why is tungsten used exclusively for the filaments of electric lamp?

Ans => The melting point and resistivity of tungsten are very high. It does not burn readily at a high temperature. The electric lamps glow at very high temperatures. Hence, tungsten is mainly used as heating element of electric bulbs.

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Answer 2

$\huge tungsten \: is \: used \: almost \: exclusively \\ \: for \: making \: the \: filaments \: of \: electric \: lamps \\ \: or \: electric \: bulbs \: because \: it \: has \: very \: high \\ \: melting \: point \: of \: 3380 \: degree \: celcius \: due \: to \: which \: the \: tungsten \: filament \: can \: be \: kept \: white \: \\ hot \: without \: melting \: away \: moreover \: tungsten \: has \: high \: flexibility \ \\ : and \: low \: rate \: of \: evaporation \: at \: high \: temperature$

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