Pause a moment and look at the plug on your computer. It has either 2 or 3 connections: 1 for the power coming in, 1 for the power going out, and maybe a third as a ground connection in case of a power surge. Like all electrical devices, the power is following through the computer to do work, like a millstone connected to a waterwheel driving by a river. If you remove the flow of water (power), the wheel stops and you can’t do any work with it.
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