Home » Electronics Fundamentals Electronics Fundamentals: (2 questions) Atoms and sub-atomic particles, electrons, ions. Insulators, conductors and semiconductors. Fields produced by currents and magnets. Units of voltage, current, resistance, impedance. Types of cells. Start 1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20