These notes start with a general overview of our standard model for understanding basic electricity and magnetism. This is followed by suggested experiments in static electricity. Finally there is a brief listing of the electronegativity series. Both attractive and repulsive interactions occur.
Mobility can change dramatically under high stress conditions as in dielectric breakdown.
Usually current carriers are uncharged. Because the force may be attractive or repulsive, charge may be positive or negative. For two systems in electrical contact charge will flow until the two voltages are equal. Because of our experimental inability to detect an isolated magnetic monopole, the model for a magnetic moment is an uncharged current loop. Faraday's experiments show that changing magnetic flux produces an electric field.