Which term describes an unintended conducting path between two points in an electrical system?

• A. Open circuit
• B. Ground fault
• C. Short circuit
• D. Series fault

Answer: (C)

A short circuit describes an unintended conducting path between two points of different electrical potential, creating a very low-impedance bridge that bypasses the designed load. When such a path forms, the source forces a large current to flow through that unintended route, which can cause overheating, damage, and tripping of protective devices.

This differs from an open circuit, where the circuit is incomplete and no current flows at all. It also differs from a ground fault, which is specifically a path from a live conductor to ground (a type of short to earth, but the general term for the situation described is short circuit). A series fault, on the other hand, is a fault that affects only the current through a single path in series with the load and does not create a fresh, low-impedance bridge between two nodes.