Which of the following best describes a short circuit?

A short circuit is best described as a path of very low resistance within an electrical circuit. This condition occurs when the current bypasses the intended load and flows through an unintended path, resulting in excessive current flow. The low resistance path allows a large amount of electrical current to pass through, which can lead to overheating, equipment damage, or even fires if not properly managed. This is why understanding the concept of resistance and how it influences current flow is crucial in electrical systems.

The other choices do not accurately represent the nature of a short circuit. A complete break in the circuit refers to an open circuit, where no current can flow. A condition where current is blocked also does not apply, as a short circuit allows current to flow freely, albeit in a detrimental manner. A normal functioning circuit would have appropriate resistance and paths for current, unlike what occurs in a short circuit.