To determine the correct unit of measurement for alternating current (AC) frequency, let's break down and analyze each of the options provided:
Option A: Gigabytes (GB)
- Gigabytes (GB) are a unit of digital information storage, commonly used to describe the size of files or storage capacity in computers and other devices.
- This unit is not related to frequency measurements.
Option B: Bandwidth (BW)
- Bandwidth (BW) refers to the range of frequencies within a given band, particularly used in the context of data transmission and communication systems. It specifies the amount of data that can be transmitted in a given amount of time.
- Although related to frequencies in communications, it is not the unit used to measure AC frequency.
Option C: Power Width Modulations (PWM)
- Power Width Modulation (PWM) is a modulation technique used to encode a message into a pulsing signal. It is often used in power applications, such as controlling the speed of motors or dimming lights.
- PWM is a method rather than a unit of measurement and is unrelated to AC frequency measurement.
Option D: Hertz (Hz)
- Hertz (Hz) is the unit of frequency in the International System of Units (SI). It measures the number of cycles per second.
- This is the standard unit for measuring the frequency of alternating current, where one Hertz corresponds to one cycle per second.
Given the detailed evaluation of each option, the correct answer for the unit of measurement for alternating current frequency is Hertz (Hz).
Thus, the correct option is:
OD. Hertz (Hz).
