Which statement correctly describes alternating current?

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Study effectively for the Burglar and Residential Fire Alarm Exam. Use multiple-choice quizzes, flashcards, and detailed explanations to get prepared and confident for your certification test.

Multiple Choice

Which statement correctly describes alternating current?

Explanation:
Alternating current is electricity that regularly reverses direction. In typical residential power, the supply frequency is 60 hertz, meaning the voltage and current reverse direction 60 times every second. That rapid reversal is what defines AC, so the statement that polarity changes 60 times per second correctly reflects how the system operates. The other options describe a fixed polarity or an extremely slow change, which don’t describe AC behavior.

Alternating current is electricity that regularly reverses direction. In typical residential power, the supply frequency is 60 hertz, meaning the voltage and current reverse direction 60 times every second. That rapid reversal is what defines AC, so the statement that polarity changes 60 times per second correctly reflects how the system operates. The other options describe a fixed polarity or an extremely slow change, which don’t describe AC behavior.

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