Question

On what principle of electric current does electric bulb works?
i.Heating
ii. Cooling
iii. Magnetic
iv. Evaporation.​

Answer 1

Answer:

An incandescent bulb works on the principleof incandescence, a general term meaninglight produced by heat. In an incandescent type of bulb, anelectric current is passed through a thin metal filament, heating the filament until it glows and produceslight.

Answer 2

Answer:

An electric bulb works on the principle of hearing effect of current. It consists of a tungsten filament with a coating of thorium. This filament gets heated up to emit light when current passes through it.

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