Question
Which of the following describes alternating current?
Answer Options
- A) Current that alternates between a positive direction and zero
- B) Current that alternates between a negative direction and zero
- C) Current that alternates between positive and negative directions
- D) All these choices are correct
Correct Answer: C
Explanation
Alternating Current (AC) is a type of electrical current where the direction of the electron flow is constantly reversing in a cyclical pattern. In a typical sine wave, the current flows in a positive direction, returns to zero, flows in a negative (reverse) direction, and then returns to zero.
Therefore, AC is current that alternates between positive and negative directions. This is the type of current supplied by power companies to homes and businesses via standard wall outlets.
This topic was automatically created to facilitate community discussion about this exam question. Feel free to share study tips, memory tricks, or additional explanations!