Current flow can be defined as:

Current flow is fundamentally defined as the movement of electrons through a conductor, such as a wire. This definition is rooted in the basic principles of electricity, where electric current is the flow of charge carriers, which are typically electrons in a metallic conductor. The movement occurs due to a potential difference (voltage) applied across the conductor, prompting electrons to move from areas of higher electron concentration to lower concentration.

This definition highlights several important aspects of electrical engineering. It lays the groundwork for understanding how circuits operate, how electrical devices function, and how electrical energy is transmitted. The notion of current flow directly relates to key concepts such as Ohm's Law and the behavior of different types of circuits.

In contrast, while the other options include terms and concepts relevant to electrical theory, they do not encapsulate the fundamental definition of what current flow itself is. For instance, fault current to ground pertains to a specific type of current encountered in malfunctioning or short-circuited systems, while power divided by impedance reflects a calculation related to circuit analysis rather than a definition of current flow. The passage of an armature through a magnetic field relates to electromagnetism and the operation of generators or motors but does not describe current flow directly. Therefore, the movement of electrons