Question

define short circuit please answer me fastly

Answer 1

an electrical circuit in a device of lower resistance than that of a normal circuit, specially one resulting from the unintended content of components and consequent accidental diversion of the current

Answer 2

Short circuit is low resistance connection between two conductors supplying electricity to any Circuit. It simply cause because of the multiple power resources. And it is also dangerous as high currents encountered can cause large amounts of heats to be produced which results fire .