Define frequency and its unit of measurement.

Frequency is defined as the number of cycles of a periodic signal that occur in one second. The standard unit of measurement for frequency is hertz (Hz). One hertz equals one cycle per second. This definition is crucial in various fields, including electronics and telecommunications, where understanding the frequency of a signal can dictate how that signal behaves in a system, how it can be processed, and what kind of components or circuits can be used effectively.

The other choices provided do not accurately define frequency. For instance, stating that frequency concerns volts per cycle or power consumed per cycle misrepresents what frequency measures, as it does not involve voltage or power in its definition. Similarly, describing frequency in terms of amperes does not reflect the concept, since amperes are a measure of current rather than a measure of cycles occurring over time. This understanding of frequency is foundational to grasping more complex concepts in electronics.