An electrical arc is a visible discharge of electricity that occurs when a current jumps through the air between two conductive materials. This phenomenon typically happens when the electrical potential difference is high enough to overcome the insulating properties of the air, creating a path for the current to flow. Arcs can produce intense heat and light, making them useful in applications like welding and cutting metals. Electrical arcs can be dangerous, as they can cause fires, burns, and damage to electrical equipment. Safety measures, such as using proper insulation and protective gear, are essential when working with high-voltage systems to prevent accidental arcs. Understanding the behavior of arcs is crucial in fields like electrical engineering and safety management.