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Voltage is the unit of measurement for electronic potential, from one point location to another.

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How can AC source with different voltage provide same power?

How is it still possible for the Adapter to provide the necessary power to the device, say a laptop, despite having a lower voltage of 110 V at some places. … I understand that the Adapter is built to handle different input AC voltage, but is a 110 V source sufficient to provide the necessary power which a 220 V can. …
Shamim Hafiz - MSFT's user avatar