Question

What is a short circuit? And when does it happen

Answer 1

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A short circuit is an electrical circuit that allows a current to travel along an unintended path with no or very low electrical impedance. This results in an excessive current flowing through the circuit. The opposite of a short circuit is an "open circuit", which is an infinite resistance between two nodes.

A short circuit occurs when the current finds a way to bypass the appliance on a path that has little or no resistance—for example, where frayed insulation bares a wire and allows it to touch the frame of the appliance, so the current can flow straight to the ground.

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Answer 2

Answer:

short-circuit is a break down in wire

it is nothing but a simple cut or breakdown in wire

Explanation:

this can happen because of heavy rain fall etc.