Why a bulb with a filament gives off light?

1 Answer

Answer :

Electricity goes through the filament in the bulb.The filament is made of a material that is not a good conductor and therefore offers "resistance" to the electricity going through it.The "resistance" results in the filament is a form of friction to the electric current.The electrical friction results in the wire getting warm, then hot, then very hot.The filament gets so hot that it starts to glow, giving off light.

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