METER MOVEMENTS


Please sign in to view the rest of this entry.

METER MOVEMENTS
METER MOVEMENTSThe basic principle of many electric instruments is that of the galvanometer. This is a device that reacts to minute electromagnetic influences caused within itself by the flow of a small amount of current. A simple galvanometer is shown in Fig. 8-1. It consists of a magnetized needle suspended within a coil of wire. When a current is passed through the wire, a magnetic field is produced, and the magnetized needle attempts to align itself with this field. Practical galvanometers cannot be constructed as simply as the one described above, but they all operate because of the reaction between magnetic and electromagnetic forces.
Citation
Thomas K. Eismin: Aircraft Electricity and Electronics, Sixth Edition. METER MOVEMENTS, Chapter (McGraw-Hill Professional, 2014), AccessEngineering Export