What does the term “frequency” refer to in electrical terms?

The term "frequency" in electrical terms specifically refers to the number of cycles per second in alternating current (AC) and is measured in Hertz (Hz). In an AC circuit, the direction of the current changes periodically, and the frequency indicates how often this cycle occurs within one second.

For example, in North America, most electrical systems operate at a frequency of 60 Hz, meaning the current changes direction 60 times every second. Understanding frequency is essential for various applications in electrical systems, including determining the performance and compatibility of electrical devices with the power supply. In contrast, total power output, type of current, and maximum voltage rating do not directly define frequency and therefore do not encapsulate the concept in question.