Question

how does an electric bulb glow ?

Answer 1

Explanation:

The filament of a electric bulb glows because of the heating effect of electric current. As the current passes through the bulb it heats the filament which gives off light.

Answer 2

Answer:

The light bulb has a tungsten filament as the light emitting media. Electricity flows through a thin tungsten wire in the light bulb called the filament. As a result of this resistance, the filament heats up and starts glowing, converting electrical energy to light energy.