Question

why the bulb of filament is thinner​

Answer 1

The filament of the bulb is generally a material which is of high resistance and high melting point. ... That red hot filament of the bulb produces the light. So to get high resistance cross-sectional area must be low, so the type of wire used is thin.

Answer 2

Answer:

When current is passed through a material of high resistance the material gets heated up until it is red hot and this is the reason it produces light. That red hot filament of the bulb produces the light. So to get high resistance cross-sectional area must be low, so the type of wire used is thin.

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