Which term describes current flow when there is no resistance present?

The term that best describes current flow when there is no resistance present is a short circuit. In the context of electrical systems, a short circuit occurs when there is a low-resistance connection between two points in an electric circuit, allowing current to flow freely and potentially at higher levels than intended. This situation can lead to an increased current that can cause damage to components or create hazardous conditions.

Understanding the implications of a short circuit is crucial for safety and system design. While a closed circuit allows for normal current flow through a load, it involves some resistance. An open circuit, on the other hand, indicates a break in the circuit, where current cannot flow at all. An infinite circuit is not a standard term used in electrical terminology; rather, it might imply a hypothetical situation where resistance is non-existent, but this is not a practical or useful description in real-world applications. Thus, the term short circuit effectively captures the essence of unrestricted current flow in a circuit without resistance.