Which type of current is characterized by reversing its direction at regular intervals?

The type of current characterized by reversing its direction at regular intervals is known as Alternating Current (AC). AC is widely used in power systems for the distribution of electricity because it can be easily transformed from one voltage level to another, making it efficient for long-distance transmission. The alternating nature of this current means that its waveform oscillates, typically in a sinusoidal pattern, which allows it to change direction periodically. This property is fundamental to the operation of many electrical devices and the infrastructure that supports modern energy distribution, such as generators and transformers.

In contrast, Direct Current (DC) flows in a constant direction, making it unsuitable for applications that require voltage transformation or long-distance transmission. Pulsating Current is a variation of DC that changes in magnitude but does not reverse direction like AC. Static Current refers to the charges that are at rest and does not represent a current flow per se. Thus, AC’s ability to reverse direction at regular intervals differentiates it clearly from the other types of current mentioned.