In a series circuit, what remains the same while voltage is additive?

In a series circuit, the current remains the same throughout the entire circuit, while the voltage across individual components can be different and adds up to the total voltage provided by the source. This consistency in current occurs because there is only one path for current to flow in a series arrangement. Consequently, regardless of the number of components connected in series, the same amount of current passes through each component.

In contrast, voltage can vary across each component depending on their individual resistances, adhering to Ohm's Law. In practical terms, if you have multiple resistors in series with an applied voltage, the voltage drop across each resistor may differ, but the current remains constant throughout the circuit. This fundamental characteristic of series circuits is crucial in understanding how electrical systems function and diagnosing problems within them.