Aircraft Electronics Technician AET - NCATT
Aircraft Electronics Technician AET - NCATT
Aircraft Electronics Technician AET - NCATT
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<strong>NCATT</strong> <strong>Aircraft</strong> <strong>Electronics</strong> <strong>Technician</strong> (<strong>AET</strong>) Study Guide<br />
• Electron<br />
o Negatively charged subatomic particles that are located and travel around (orbit)<br />
the nucleus in an imaginary sphere or shell at the speed of light (186,000<br />
miles/second)<br />
o Electrons are involved in the conduction of electricity<br />
• E.M.F.<br />
o The force that causes electrons to flow through a conductor<br />
o This force is abbreviated e.m.f.<br />
o The unit of measurement for electromotive force is the volt<br />
o In mathematical problems voltage is expressed by the letter “E”<br />
• Farad<br />
o Basic unit of capacitance<br />
o One farad holds one coulomb under a pressure of one volt<br />
• Henry (H)<br />
o Basic unit of measurement for inductance of an electrical coil<br />
o One (1) henry is the inductance of a coil when a change of current of one (1)<br />
ampere per second induces an e.m.f. of one (1) volt<br />
o In mathematical problems inductance is expressed by the symbol “L”<br />
• Inductor<br />
o Coil or other device used to introduce inductance into a circuit<br />
o An inductor is a winding, or coiling, of multiple turns of wire<br />
• Insulator<br />
o Material or device used to prevent the passage of heat, electricity, or sound from<br />
one medium to another<br />
• Left-hand Rule<br />
o Refers to electrical generators<br />
o This rule is for determining the direction of movement of a current-carrying<br />
conductor in a magnetic field<br />
• Magnetic Permeability<br />
o Measure of ease that lines of flux travel through a material<br />
• Magnetism<br />
o Ability of a magnet to attract certain materials containing iron and to influence<br />
electrons<br />
o Magnetism is the principal way to effectively produce AC electricity<br />
• Metric Prefixes<br />
o Measurements relating or using the metric system of measurement<br />
• Neutron<br />
o Neutral subatomic particles that exist within the nucleus of all atoms<br />
o Neutrons are not involved in the conduction of electricity<br />
• Ohm (Ω)<br />
o Unit of electrical opposition to the flow of current<br />
Copyright © 2012 by the National Center for Aerospace & Transportation Technologies. All rights reserved. Individuals may<br />
download, print, and make copies of this document for their own personal use. Commercial use prohibited.<br />
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