👉 In physics and engineering, a subcasing is a concept in the field of electromagnetism that refers to a region or area within an object where the electric field is significantly weaker than outside it. This phenomenon occurs when there are differences in charge distribution between two points within an object. Subcasing can be explained using the principle of superposition, which states that the net force acting on an object can be described by adding the forces due to different charges or currents. In the context of electrom