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Chemical Effects of Electric Current — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceChemical Effects of Electric Current2 Marks
Question
The bulb glows when the electric current passes through it. Explain why?
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Answer

Due to the heating effect of current, the filament of the bulb gets heated to a high temperature and it starts glowing. However, if the current through a circuit is too weak, the filament does not get heated sufficiently and it does not glow.

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