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

• A. Parallel
• B. Series
• C. Combined
• D. Hybrid

Answer: (B)

In a series circuit, the same direct current (DC) flows through all components. This is because the components are connected in a single path, so the electrical current that leaves the power source must pass through each component consecutively. Since there are no branching paths in a series configuration, the current remains constant regardless of the number or type of components present. This consistency in current is a fundamental characteristic of series circuits.

In contrast, a parallel circuit allows the current to split across multiple branches. Each branch can carry different amounts of current depending on the resistance of the components within those branches, which means the total current supplied by the power source is the sum of the currents in each individual branch. Combined and hybrid circuits incorporate both series and parallel elements, leading to varying current levels through different sections of the circuit.