What is indicated by the movement of 1 coulomb of charge in a circuit?

The movement of 1 coulomb of charge in a circuit is directly related to the measurement of current. Current, defined as the flow of electric charge, is measured in amperes, where 1 ampere is equivalent to 1 coulomb of charge passing through a point in a circuit in one second. This means that when 1 coulomb of charge moves, it provides a clear measurement of how much charge is flowing within that time frame, thus representing the flow of electric current.

The other options refer to different electrical concepts. The completion of a circuit does not specifically convey information about charge movement, as a circuit can be completed without any current flow. Voltage represents the difference in electric potential energy per unit charge, while resistance is a property of a material that opposes the flow of current. Each of these concepts plays a role in the overall functioning of electrical systems, but the movement of charge specifically identifies the flow of current.