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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Electrons move back and forth, in AC wires.
Electrons move in one direction in DC wires.
Both are good, but have many pros and cons to why we use them where we do.
AC can be sent further with more power, less fixes, and less wiring, which just costs less. You can send 3 wires in one direction, and they don’t have to circle back. You can connect each building off of those wires, and if anything we’re to happen with one building, it wouldn’t affect the others with how we set it up.
To do the same thing with DC, it would cost more money overall, and is an extremely wasteful use application. You would have to have more power plants closer to where they deliver to buildings, and much more wiring, which is thick, and expensive to make, install, repair, and maintain.
With AC, you’ll hear different terms used instead of positive and negative. Because it’s not.
Typical AC- HOT, HOT, NEUTRAL.
DC- POSITIVE and NEGATIVE.
(And both can add a GROUND for safety.)
There’s much more to this, but that would take too long to write.
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