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Question

Why does the bulb glow, when the electric current passes through it?

A
Due to the lighting effect of electric current.
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B
Due to the magnetic effect of electric current.
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C
Due to the chemical effect of electric current.
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D
Due to the heating effect of electric current.
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Solution

The correct option is D Due to the heating effect of electric current.
Due to the heating effect of electric current, the bulb glows when the electric current passes through it. The filament of the bulb gets heated to a high temperature and it starts glowing.

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