What is the flow direction of electrons in direct current?

In direct current (DC), electrons flow in one direction only. This unidirectional flow means that the current has a constant polarity, ensuring that electrons move steadily from the negative terminal to the positive terminal of a power source, such as a battery. This consistent movement is what distinguishes DC from alternating current (AC), where electrons flow back and forth, reversing direction periodically. The one-way flow of electrons is fundamental to many applications, including battery-powered devices and electronic circuits, where a stable power supply is required for operation. Understanding this characteristic of direct current is crucial for those studying electrical systems and components, as it informs how circuits are designed and how devices function.