How is frequency defined in an electrical context?

Frequency in an electrical context is defined as the number of cycles of alternating current (AC) that occur in one second. This measurement is critical in understanding how AC systems operate, as it determines the rate at which electrical energy oscillates. Frequencies are measured in hertz (Hz), where one hertz equals one cycle per second.

This concept is integral when working with various electrical devices and systems, as different applications require specific frequency ranges to function correctly. For instance, in power systems, common frequencies include 50 Hz or 60 Hz, depending on the geographical region. Understanding frequency allows technicians to troubleshoot issues related to timing and synchronization in circuits.

In contrast, the other options pertain to different electrical concepts. The total resistance of a circuit refers to how much resistance there is to the flow of current, while the phase angle concerns the relationship between the voltages and currents in AC circuits, not the cycles themselves. These concepts do not directly define frequency but are important elements in the broader study of electrical systems.