In electrical terminology, what is the difference between AC and DC?

The distinction between AC (alternating current) and DC (direct current) is fundamental in electrical terminology. AC changes direction periodically, which means the flow of electric charge reverses at regular intervals. This characteristic allows AC to be easily transformed to different voltages, making it efficient for long-distance transmission, such as in power lines.

On the other hand, DC flows in one direction only. This steady unidirectional flow makes DC suitable for applications like battery-powered devices, where a constant voltage is required. The periodic change in direction of AC is integral to its function and applications in homes and industries, where devices are designed to handle this type of current.

Understanding this key difference is crucial for anyone working in electrical fields, as it influences everything from circuit design to energy distribution systems.