DEFINITION AND CHARACTERISTICS


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DEFINITION AND CHARACTERISTICS
DEFINITION AND CHARACTERISTICSAlternating current is defined as current that periodically changes direction and continuously changes in magnitude. (Remember, current is defined as the movement of electrons.) The current starts at zero and builds up to a maximum in one direction, then falls back to zero, builds up to a maximum in the opposite direction, and returns to zero. In like manner, the voltage attains a maximum in one direction, drops to zero, rises to a maximum in the opposite direction, and then returns to zero. Voltage (electrical pressure) does not actually flow; therefore, when voltage changes direction, the positive and negative values simply reverse. That is, the voltage polarity of the circuit reverses.It is diff…
Citation
Thomas K. Eismin: Aircraft Electricity and Electronics, Sixth Edition. DEFINITION AND CHARACTERISTICS, Chapter (McGraw-Hill Professional, 2014), AccessEngineering Export