In which type of circuit is DC current the same through all components?

In a series circuit, the same direct current (DC) flows through all components because there is only one path for the current to travel. When components such as resistors, capacitors, or inductors are connected in series, each component experiences the same amount of current. This characteristic is a fundamental property of series circuits, making them distinct from parallel circuits, where the current may vary between different paths, and from resonant or branch circuits, which involve more complex arrangements of components. The uniform current throughout a series circuit is also influenced by Ohm's law, as the total resistance in the circuit is simply the sum of the resistances of all components, affecting how the voltage is distributed but not the current.