What is a characteristic of current in a series circuit?

In a series circuit, one of the fundamental characteristics is that the current remains constant throughout all components. This means that every component in the circuit experiences the same current flow. The reason for this uniformity is that there is only one path for the current to travel through; thus, whatever amount of current flows out of the power source must flow through each component in turn.

When a series circuit is connected, the total voltage from the power source is divided among the components, but the current itself does not change as it passes through each one. This phenomenon arises from the conservation of charge, which dictates that charge cannot accumulate at a junction or a resistor in the circuit, maintaining a steady current.

In contrast, the other options do not accurately describe the behavior of current in a series circuit. While the voltage may vary across components according to their resistance, and the total current may vary depending on the supplied voltage and total resistance, the defining feature is that current remains the same at all points in the series configuration.