HVAC Level 2 Alternating Current Module (03206) Practice Test 2026 - Free HVAC Practice Questions and Study Guide

The term that describes the number of cycles a sine wave completes in one second is known as frequency. Frequency is measured in hertz (Hz), where one hertz corresponds to one cycle per second. This concept is fundamental in understanding alternating current (AC) systems, as it relates directly to the behavior and characteristics of electrical signals.

The period, which is another important parameter associated with waveforms, represents the duration of time it takes for one full cycle to complete. While the period and frequency are related (the period is the inverse of frequency), the question specifically asks for a term that defines cycles per second, making frequency the correct choice.

Cycle refers to a single complete waveform, and while armature pertains to parts of an electrical machine (such as a motor or generator), it is not relevant to the definition of cycles per second in the context of waveforms. Thus, the focus should be on understanding the frequency as the primary characteristic that quantifies how often cycles occur within a set timeframe.