Copper isnot used in filament lamp instead of tungsten.why?
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Its melting point is lower than tungsten and at high temperature the copper will melt. Resistivity of tungsten is higher than copper. If we use a thick tungsten wire in the electric bulb , then the resistance will get reduced and to achieve the requisite heat, more energy will be spent.
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Copper melting point is lower than tungsten and at high temperature the copper will melt.
Resistivity of tungsten is higher than copper.
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