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Why can't a bulb turn on without electricity?

Updated: 8/18/2019
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12y ago

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An incadescent bulb lights up because the voltage source creates a current through the filament of the bulb and it heats up because of its composition and gives off light as a result. No electricity, no voltage and no current.

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12y ago
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Q: Why can't a bulb turn on without electricity?
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