Simple Explanation

Electrical current that flows steadily in one direction, unlike alternating current (AC) which reverses direction.

Concise Technical Definition

A type of electrical current where electrons flow uniformly from the negative to the positive terminal. Voltage remains constant over time. Used in batteries, solar panels, and electronics.

Layman-Friendly Analogy

Imagine water flowing through a pipe in a single, steady direction—that's like DC. AC would be like the water flowing back and forth.

Industry Usage Summary

DC power is critical in low-voltage electronic systems such as smartphones, laptops, car batteries, and LED lighting. Audio gear and amplifiers often rely on DC circuits internally even when powered by AC.

Engineering Shortcut

DC is used for constant voltage applications. In circuits, DC is often derived from an AC source using rectifiers and filters to convert and smooth the signal.

Full Technical Explanation

Direct Current refers to the unidirectional flow of electric charge. It is characterized by a constant voltage level and is used in any device requiring stable, uninterrupted power. DC can be produced by sources like batteries, solar cells, and regulated power supplies. It contrasts AC, which alternates direction periodically.