What is the definition of frequency in electrical engineering?

Frequency in electrical engineering is defined as the number of cycles per second of a periodic wave. This is measured in hertz (Hz), where one hertz is equal to one cycle occurring in one second. Understanding frequency is critical, as it directly relates to the behavior of alternating current (AC) systems, signal processing, and the operation of various electrical devices. The concept of frequency is fundamental in multiple areas, including communications and power systems, where the frequency of waveforms determines how they interact with components and loads within circuits. This concept helps engineers in designing systems that operate efficiently and effectively at desired frequencies.