What characteristic is true for all components in a series circuit?

In a series circuit, one of the defining characteristics is that the same current flows through all components connected in the circuit. This occurs because the components are arranged end-to-end, allowing the current to have only one path to follow. As a result, every component experiences the same amount of current, which is determined by the overall resistance of the circuit and the voltage supplied by the source according to Ohm's law (V = IR).

This unique behavior of current in a series configuration contrasts with parallel circuits, where current can split and different paths can carry different amounts of current. Understanding this concept is crucial for analyzing series circuits, as it influences how total resistance is calculated and how individual voltages across each component can vary depending on their resistances, even though the current remains constant.