Barber Practice State Board Practice Exam

In which direction does direct current flow?

1. Upward and downward

2. One direction

3. In circles

4. Both positive and negative directions

The correct answer is: One direction

Direct current (DC) is characterized by the flow of electric charge in a single, consistent direction. This implies that DC has a uniform polarity, meaning that it moves from the positive terminal to the negative terminal without reversing. The reliability and stability of DC make it suitable for many applications, such as powering electronic devices and systems that require a constant voltage. This unidirectional nature distinguishes DC from alternating current (AC), where the flow of electricity periodically changes direction. In the context of the question, understanding that direct current flows in one direction provides clarity on the basic principles of electricity, which is essential for practices involved in barbering, particularly when using electrical tools.