An electric arc is a visible discharge of electricity that occurs when a current flows through the air between two conductive points. This phenomenon typically happens when the voltage is high enough to overcome the insulating properties of the air, creating a path for the current. Electric arcs can produce intense heat and light, making them useful in applications like welding and lighting. Electric arcs are often seen in devices such as arc welders and lightning. They can also pose safety risks, as the high temperatures generated can cause burns or ignite flammable materials. Proper precautions are essential when working with or around electric arcs.