Does it go back into the wire or does it still stay in the computer? And if it stays, how does the computer hold all that power?
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What energy? When you turn off a PC, or any electrical device, it just stops drawing power from whatever power source it is connected to.
Electrical devices don’t function because energy is placed inside them somehow. The energy comes from the electricity *flowing through them*. Imagine each component that needs power as a little water wheel on a river – the flow of the river pushes the water wheel, and that’s what makes the component function. When the flow is turned off, everything just comes to a stop.
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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