In a series circuit, how many paths exist for the current?

• A. Multiple paths
• B. One path
• C. No path
• D. Infinite paths

Answer: (B)

In a series circuit, the current has one path to flow through all the components. The components are connected end-to-end in a single loop, so all the charge must pass through each element in sequence and return to the source. There are no branches to provide alternate routes, which is why there is only one path for the current. If there were multiple paths, that would be a parallel arrangement, not a series one. An important consequence is that the same current flows through every component in a series circuit, and opening the circuit stops current everywhere.