Question

Why is a copper wire not used in the filament of a bulb? What will happen if we use a thick tungsten wire in an electric bulb?​

Answer 1

Answer:

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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.

Explanation:

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Answer 2

Answer:

As for the filament of bulb to glow the material used in it should be of HIGH RESISTANCE and should not OXIDE READILY(BURN EASILY) , copper is not used and tungsten , which has a resistance of 3380°C , is used.

If we use a thick tungsten wire in an electric bulb , the bulb will glow but it will glow lighter.

Resistance is inversely proportional to thickness(diameter) square and thus resistance will be low. And if resistance is low bulb will glow less.

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