Which type of current flows in only one direction?

The type of current that flows in only one direction is known as direct current (DC). Direct current is characterized by a consistent flow of electric charge in a single direction, making it essential for many electronic devices and power systems. In applications such as batteries and solar power systems, the current generated is direct, ensuring a stable and predictable energy source.

Unlike alternating current (AC), which periodically changes its direction, direct current maintains a steady polarity and voltage level. This characteristic makes direct current particularly suitable for devices like smartphones, laptops, and other electronics that rely on a stable power supply for their operation. Understanding the nature of direct current is crucial for anyone involved in maintenance and servicing of electrical equipment since employing the correct type of current is essential for safety and functionality in those repairs.