In a series circuit, what remains true about the components?

In a series circuit, it is true that all components share the same current. This is a fundamental principle of series circuits, stemming from Kirchhoff's current law, which states that the current flowing into a junction must equal the current flowing out. Since the components are connected in a single path, the same amount of charge flows through each component, ensuring that they all have the same current.

While it is important to note that the voltage across each component can vary depending on the component's resistance (Ohm's law), the defining characteristic of a series circuit is that the current remains constant throughout all components. This uniformity of current is crucial for understanding how series circuits behave in different scenarios, such as when components are added or removed from the circuit.

The concept of varying resistances is also relevant, as different components can have different resistances, affecting the total resistance of the circuit, but this does not change the fact that the current is the same through all components. Resistance being irrelevant contradicts the essential role resistance plays in defining how voltage and current interact in the circuit.