Which of the following best describes the measurement unit of frequency?

The measurement unit of frequency is best described by Hertz. Frequency refers to the number of cycles of a periodic wave that occur in one second, and Hertz is defined as one cycle per second. This unit is widely used in various fields, including physics and engineering, to quantify phenomena such as sound waves, radio waves, and other oscillatory behaviors.

In contrast, the other options represent different physical quantities:

• Milliamperes is a unit of current, representing one-thousandth of an ampere, and is used in electrical contexts.

• Decibels are a logarithmic unit used to measure sound intensity or power, not frequency.

• Watts measure power, representing the rate at which energy is transferred or converted.

Each of these units serves specific purposes in their respective fields, but Hertz is the only unit that directly relates to measuring frequency.