

As en electronics engineer I’m going to “Yes But…” this and say that the lower the voltage/current you’re trying to manipulate the more concentration it requires to do it without over-voltaging the components you’re trying to manipulate and frying the circuitry.
So whilst this would be possible you’d have to:
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Hold all the cores, ALU, etc. in the CPU at the current state that they’re in
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Then spend time flipping the bits (not one at a time but like a whole 32 bit number) required to represent your instructions.
With enough practice and meditation you get a “feel” for the instructions and can do this but it takes time. I think this is fair as once you’ve learnt a CPU architecture most of the machine instructions are the same and it’s just a matter of getting them to run in the right order.
This way you don’t start out overpowered and there’s a high skill ceiling.
(I may or may not be writing a book around this already and have thought about it a lot haha)

Well is this about permanent magnets loosing their functionality or the whole concept of magnetism just vanishing?
One puts us back to a steampunk technological ceiling the other means the universe pops out of existence; electricity, magnetism, and light are closely linked so removing one is likely to just break reality.