Which current flows in one direction steadily?

• A. Direct current
• B. Alternating current
• C. Microcurrent
• D. Faradic current

Answer: (A)

Direct current means the electric charge travels in a single, constant direction. It flows steadily from the source to the load without reversing, like the current you get from a battery. Alternating current, by contrast, keeps reversing direction in a regular cycle, which is why it can be transformed easily and powers outlets in homes. The other terms describe specific, sometimes pulsed or interrupted waveforms used in certain therapies, and they do not provide a constant one-way flow. So the current that flows in one direction steadily is direct current.