What type of current flows in one direction only?

Direct Current (DC) flows in one direction only. In DC, the electric charge (current) moves in a consistent and uniform direction, which is typically from the positive terminal to the negative terminal of a power source. This unidirectional flow is characteristic of DC and is commonly used in battery-operated devices, electronics, and certain types of motors.

In contrast, Alternating Current (AC) periodically reverses direction, changing the flow of electric charge back and forth. This is the type of current widely utilized in homes and commercial power systems to supply electricity to appliances and devices. Surge and static electricity refer to different phenomena and do not describe a current that consistently flows in one direction. Surge relates to a sudden increase in voltage or current, while static is a buildup of electric charge that does not involve a current flowing through a circuit.

Therefore, understanding the nature of DC as a continuous, unidirectional flow of current provides clarity on why it is the correct answer in this context.