Why only tungsten metal is used in filament of bulb other than all metal
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Only tungsten metal is used in filament of bulb other than all metals because tungsten has:-
i) The highest melting point (3695 K),
ii) The lowest vapor pressure,
and
iii) The greatest tensile strength
out of all the metals.
i) The highest melting point (3695 K),
ii) The lowest vapor pressure,
and
iii) The greatest tensile strength
out of all the metals.
Answered by
1
Tungsten has a high melting point and resistivity.
For the filament of a bulb such substance are needed that get heated up on passing electricity so as to produce light.
Due to tungsten's high resistivity it gets heated up on passing electricity. It's high M.P prevents it from melting at that high temperature.
So tungsten is used as a filament.
Hope, it helps ^_^
For the filament of a bulb such substance are needed that get heated up on passing electricity so as to produce light.
Due to tungsten's high resistivity it gets heated up on passing electricity. It's high M.P prevents it from melting at that high temperature.
So tungsten is used as a filament.
Hope, it helps ^_^
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