What characterizes alternating current?

Alternating current is characterized by its ability to reverse direction at regular intervals, which is a fundamental property of this type of electrical current. This alternating flow is represented by a wave pattern and is typically measured in hertz (Hz), indicating how many times the current alternates per second. In practical applications, this characteristic allows for efficient transmission of electricity over long distances and is commonly used in household electricity and various devices.

The steady reversal of direction differentiates alternating current from direct current (DC), which flows in one consistent direction. Additionally, while it is important to ensure that the type of current used in pyrotechnic applications is suitable and safe, alternating current itself can indeed be utilized in various aspects of lighting and triggering systems within pyrotechnics, contrary to what might be suggested by the option regarding its usability.