Polarity is a term used in electricity, magnetism, and electronic signaling.
If the two poles are connected by a conductive path such as a wire, electron flow from the negative pole toward the positive pole. This flow of charge carriers constitutes an electric current . In physics, the theoretical direction of current flow is considered to be from positive to negative by convention, opposite to the flow of electrons. The movement of electric charge carriers inevitably produces a magnetic field. Conversely, any magnetic field is the result of the motion of charge carriers.