What measurement corresponds to one cycle per second?

One cycle per second is measured as one Hertz (Hz). The term "Hertz" defines the frequency of a periodic event, which is simply the number of cycles occurring in one second. Therefore, when considering "one cycle per second," it directly aligns with the definition of 1 Hz.

Other measurements such as kilohertz (kHz), megahertz (MHz), and gigahertz (GHz) represent larger multiples of Hertz. Specifically, 1 kHz equals 1,000 Hz, 1 MHz equals 1,000,000 Hz, and 1 GHz equals 1,000,000,000 Hz. Thus, these options indicate frequencies much higher than one cycle per second and do not match the definition of 1 Hz.