At Is Short Circuit?

A short circuit is simply a low resistance connection between the two conductors supplying electrical power to any circuit. This results in excessive current flow in the power source through the 'short,' and may even cause the power source to be destroyed.

What exactly is short circuit?

A short circuit (sometimes abbreviated to short or s/c) is an electrical circuit that allows a current to travel along an unintended path with no or very low electrical impedance. ... The opposite of a short circuit is an "open circuit", which is an infinite resistance between two nodes.

What happens during short circuit?

If a short circuit occurs—or even if too many appliances get hooked up to one wire so that too much current flows—the wire in the fuse heats up quickly and melts, breaking the circuit and preventing a fire from starting.