Question

how a bulb glow Explain .....

Answer 1

Electricity flows through a thin wire in the light bulb called the filament. ... Therefore as a result of this, the filament heats up and starts glowing, converting electrical energy to light energy. This is because of the Joule-effect, which means that resistances heat up when electrical current runs through them.

Answer 2

The bulb consists of tungsten filament which works on heating effect of current..when current is passed through it ,it gains a lot of heat and glows..it does not melt as it does not oxidise easily..

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