DC voltage sources have a positive (+) terminal and a negative (-) terminal. Which of the following statements explains why AC voltage sources do not have positive and negative terminals?
A)AC voltage at each terminal is always changing.
B)AC current does not involve charged particles.
C)AC current is safe and warning labels are not needed.
D)AC voltage at each terminal is always higher than ground.

Question

Quizplus · Accepted Answer

AC voltage at each terminal is always changing, meaning the polarity (positive or negative) reverses periodically. Unlike DC voltage, which maintains a constant polarity, AC voltage cycles through positive and negative values, making the designation of fixed positive and negative terminals irrelevant.

DC Voltage Sources Have a Positive (+) Terminal and a Negative