Given a scientific passage and an answer, generate a question for the given answer.

Passage: The Figure below shows the direction of the current that is generated by a moving magnet. If the magnet is moved back and forth repeatedly, the current keeps changing direction. In other words, alternating current (AC) is produced. Alternating current is electric current that keeps reversing direction. Answer: alternating current
What is the term for electric current that keeps reversing direction?