Final answer:
Arc blow is a phenomenon in welding caused by the electromagnetic field surrounding the welding arc. It is covered in the welding section of a course or textbook.
Step-by-step explanation:
Arc blow is a phenomenon that occurs in welding. It is caused by the magnetic properties of the welding process, specifically the electromagnetic field surrounding the welding arc. When the welding current passes through the arc, it creates a magnetic field that can interact with the surrounding metal. This interaction can cause the arc to move away from the intended path, resulting in arc blow.
Arc blow is typically covered in the section of a welding course or textbook that discusses welding processes and techniques. It is important for welders to understand arc blow and how to mitigate its effects to ensure proper weld quality.