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Milady Electrology Practice Exam

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The unit used to measure cycle rate in alternating current is?
Correct Answer:
Hertz (Hz)
Explanation:
The cycle rate of alternating current is its frequency—the speed at which the current reverses direction per second. Frequency is measured in hertz, where one hertz equals one complete cycle per second. That’s why the unit used to express how fast the cycles occur is hertz. Ampere measures current, volt measures potential difference, and kilowatt measures power, so they describe other electrical properties, not how often the cycles repeat. In power systems you’ll commonly see 50 Hz or 60 Hz, illustrating the practical use of frequency.

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