What does direct current refer to?

Direct current refers to a continuous flow of electrons in the same direction, which is characterized by a consistent and unidirectional movement of electric charge. In a direct current (DC) circuit, the voltage remains constant over time, leading to a steady and reliable source of power. This is in contrast to alternating current (AC), where the direction of the flow of electrons periodically reverses.

Understanding direct current is essential for various applications, especially in electronic devices that require a stable power source. DC is commonly used in batteries, solar power systems, and electronics, where the need for a constant voltage is critical. The nature of this flow makes it ideal for sensitive electronic circuits that need a reliable behavior without fluctuations.