Which one of the following statements most accurately reflects the nature of ac power?
A
The current in an ac circuit flows in one direction, but changes value periodically
B
The current in an ac circuit flows in one direction at a steady level
C
The current in an ac circuit changes direction periodically
D
The current in an ac circuit flows in two directions at the same time
E
None of the above
Correct Answer: The current in an ac circuit changes direction periodically