What does AC stand for in the context of aircraft electrical systems?

In the context of aircraft electrical systems, AC stands for Alternating Current. This refers to the type of electrical current that periodically reverses direction, contrasting with direct current (DC), which flows in a single direction.

Alternating current is commonly used in aircraft for its advantages in efficiency and the ability to easily transform voltages using transformers, which is critical for distributing power throughout the aircraft systems. AC systems can also often carry more power over longer distances compared to DC systems, making them suitable for high-demand applications such as avionics, lighting, and other electrical equipment on board.

Understanding the distinction between AC and other forms of current is crucial when discussing electrical systems in aviation, as each type has specific uses, components, and implications for aircraft performance and safety.