Just wondering cus like wouldn’t it be more convenient to just plug your phone into the wall without a brick, or like cheaper to build a pc without a power supply? why do these devices need DC but lamps, fridges, fans, most household appliances can run off AC?
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imagine ac power is like a wiggly line that goes up and down, while dc power is like a straight line. Household things like fridges are okay with wiggly power but phones and computers prefer straight power to work there best
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