Aviation Mechanic - General, Airframe, and Powerplant › I. General › Task A. Fundamentals of Electricity and Electronics

AM.I.A.K5

Knowledge

Alternating current (AC) electrical circuits.

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Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Pilot's Handbook of Aeronautical Knowledge p. 7-30
Chapter 7: Aircraft Systems › Electrical System
fuses, and circuit breakers • Voltage regulator • Ammeter/loadmeter • Associated electrical wiring Engine-driven alternators or generators supply electric current to the electrical system. They also maintain a sufficient electrical charge in the battery. Electrical energy stored in a battery provides ... entire electrical system. During operations at low engine rpm, the electrical needs must be drawn from the battery, which can quickly be depleted. Alternators have several advantages over generators. Alternators produce sufficient current to operate the entire electrical system, even…
Aviation Maintenance Technician Handbook - General p. 12-44
Chapter 12: Fundamentals of Electricity & Electronics › Alternating Current (AC) & Voltage › AC and DC Compared
AC and DC Compared Many of the principles, characteristics, and effects of…
Aviation Maintenance Technician Handbook - General p. 12-54
Chapter 12: Fundamentals of Electricity & Electronics › Variable Capacitors › Capacitors in Alternating Current
Capacitors in Alternating Current If a source of AC is substituted for the battery, the capacitor acts quite differently than it does with DC. When AC is applied in the circuit, the charge on the plates constantly changes. [Figure ... This means that electricity must flow first from Y clockwise around to X, then from X counterclockwise around to Y, then from Y clockwise around to X, and so on. Although no current flows through the insulator between the plates…