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If you use 'polarity' in the sense of electric charge, no, it does not. Voltage is simply another word for potential difference and potential difference doesn't have an electric charge. Potential, on the other hand does, but its charge polarity depends on from where it is being measured.

If you use 'polarity' in the sense of direction, then, yes, it does. You can allocate direction to a voltage.

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9y ago
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11y ago

When it's in a closed circuit, then you'd see the polarity reverse throughout the circuit.

But if you were to measure on an empty outlet, you'd only see the reverse going on at the wire that's carrying the phase(the "hot" wire.)

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13y ago

no, ac current is bi-directional and dc current flows posative to negative

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Q: Does polarity reverse in both wire in an ac circuit?
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