While electric current takes every path it can to go from an area of high potential to an area of low potential, most of the current goes down the path of least resistance.
In an ordinary circuit, many things provide resistance to limit current and prevent damage to the other objects in the circuit.
But if one were to create a path with very little resistance — known as a short circuit — from a high to a low potential source, a very large amount of current would flow that way, which could cause a fire in the wires or other circuit components not designed to handle the excess current.
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