Question

why do the filament of a bulb becomes red hot and when?​

Answer 1

Answer: Hello,

Here is your answer

The filament of an 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. The filament then heats up and becomes red-hot as a result of this it begins to glow, turning electrical energy into light energy.

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