How Does a Diode in an Ammeter Work?
How a diode works A diode is what is known as a two-terminal device. This means that it has two electrodes through which current can flow. The primary use of a diode is to keep a current only flowing in one direction. This is what is commonly known as the rectifying function of a diode. A diode, when functioning properly, will allow current to only flow in one direction (known as the forward direction) and halt and current in the other direction (reverse direction). Diodes, in addition to their rectifier function, can be used to turn alternating currents (AC) into direct durrents (DC). How an ammeter works Ammeters are used to measure electric current within a circuit. Currents are measured in the unit of the ampere, which gives the ammeter its name. Ammeters generally use magnetic deflection to measure electrical current. The electric current passes through a coil, which causes a magnetic field to be generated. This magnetic field causes the coil to move or “deflect.” The movement of
