Starting from my secondary school, I have never understood the concept of short circuits. For instance, why would current prefer a path with no resistance than a path with much resistance? How does it know or decide that that there is much resistance in the one path and no resistance in the other? I know I am imagining current as a person that has his own will. But what is the physics behind it? None of my teachers were able to give me a satisfying answer so far and it really bugs me.
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