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The filament ...

Question

The filament of a bulb glows due to?

A

Heating effect of the electric current.

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B

Magnetic effect of electric current.

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C

Chemical effect of electric current.

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D

All of these.

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Solution

The correct option is A
Heating effect of the electric current.

The filament of an electric bulb glows due to the heating effect of electric current. As the current passes through the bulb it heats the filament following which it begins to glow.

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