How is the frequency of Alternating Current (AC) measured?

The frequency of Alternating Current (AC) is measured in hertz. One hertz (Hz) is defined as one cycle per second, which means it represents how many times the current changes direction in one second. This measurement is crucial for understanding the behavior of AC systems, as different devices and systems operate at specific frequencies that can influence their performance and compatibility.

For example, household AC power typically operates at 60 Hz in the United States, which is essential for ensuring that electrical appliances function correctly. Understanding frequency is fundamental for anyone involved in low voltage communication systems, as it affects signal integrity, transmission rates, and overall system performance.

The other options represent different electrical measurements: volts measure voltage, amperes measure current, and watts measure power. Each of these is important in its own right but does not pertain to frequency directly. Thus, hertz is the appropriate unit for measuring the frequency of alternating current.