Plasma is that the fourth state of matter but we'd like to define it in accordance with its purpose when working with plasma cutters. in this sense, plasma is an electrically heated gas that's created by heating the air to extreme temperatures making it electrically conductive or in other words, it becomes ionized gas. This ionized air/gas harassed becomes a plasma cutting arc that you simply use to slice the metal like butter. Inside the plasma torch, there's an electrode and it receives the electricity from the machine. The propellent or air is additionally supplied through the plasma torch and once the electrode initiates the arc with the conductive metal (work-piece), the plasma gas arc is born.