Diodes and Current-Voltage Graph for a Diode

 A graphic illustrating a variety of diodes. The circuit symbol and direction of current through a diode are shown. The cathode is labelled and three examples of diodes are illustrated: 1N4148, 1N4001 and 1N5401.

A current-voltage graph for a 1N4148 diode. The regions of forward and reverse bias and the forward and maximum reverse voltages are labelled.