Ammeter to be measured with both polarities, common in scientific and industrial equipment. Zero-center ammeters are also commonly placed in series with a battery. In this application, the charging of the battery deflects the needle to one side of the scale (commonly, the right side) and the discharging of the battery deflects the needle to the other side. A special type of zero-center ammeter for testing high currents in cars and trucks has a pivoted bar magnet that moves the pointer, and a fixed bar magnet to keep the pointer centered with no current. The magnetic field around the wire carrying
Electrical Artificer Electrical Artificer An Electrical Artificer (EA) is an electrical technician competent in the electrical maintenance of ship's machinery such as engines and generators. This was originally a Royal Navy term for those trained and competent in the installation and maintenance of ships electrical systems. The title has been replaced in the Royal Navy . However the Irish Naval Service continues to use the term 'Electrical Artificer' (EA) for electrical technicians. A distinctive propeller insignia is worn to identify these personnel. Training is completed in the National Maritime College which is incorporated into the Cork Institute of Technology. Prior to its