What is the term for the bright light formed when a strong current jumps a gap in a circuit or between electrodes?

The term for the bright light that occurs when a strong current jumps a gap in a circuit or between electrodes is known as arcing. Arcing happens when the voltage is high enough to overcome the resistance of the air or other insulating material between the two points, allowing the current to flow through that gap. This process generates a significant amount of heat and produces light due to the ionization of the air particles in the path of the current, resulting in a visible arc.

Arcing is a common phenomenon in electrical systems, particularly when equipment is being switched on or off, and it can pose safety hazards, including the risk of electrical fires or equipment damage. Understanding arcing is crucial for anyone working with electrical systems, as it highlights the need for proper safety measures when dealing with high voltages or faulty equipment.

The other terms, while related to electrical phenomena, do not accurately describe the specific action of current jumping a gap. Flashing may refer to a brief light or signal, sparking typically involves brief, small discharges of electricity (not necessarily jumping a gap), and glowing implies a continuous light without the jumping action involved in arcing. Thus, arcing is the precise term that captures the essence of this electrical occurrence.