What unit is frequency measured in?

Frequency is measured in hertz (Hz), which quantifies the number of cycles per second of a periodic phenomenon. The term "hertz" refers to the number of times an event repeats itself within one second. For instance, if a sound wave vibrates back and forth 440 times in one second, it has a frequency of 440 Hz.

Understanding frequency is important in various fields such as physics, engineering, and audio sciences, as it influences how phenomena like sound waves or electromagnetic waves behave. Other units mentioned, such as milliamperes, microseconds, and watts, measure different electrical and physical quantities: milliamperes relate to electric current, microseconds to time intervals, and watts to power. Therefore, hertz distinctly measures frequency, recognizing it as the correct answer.