Which circuit has only one loop for current to flow through?

Which circuit has only one loop for current to flow through?

• A. Series circuit
• B. Parallel circuit
• C. Open circuit
• D. Mixed circuit

Answer: (A)

A single closed path for current means electrons have one continuous route to travel from the power source, through every component, and back to the source. In a series arrangement, components are connected end to end in one line, so the current flows through each part one after another and there is only one loop. The same current passes through every component because there’s just this single path. In contrast, a parallel setup splits the current into multiple branches, giving more than one path back to the source, which means more than one loop. An open circuit has a break in the path, so there isn’t a complete loop for current to flow at all. A mixed circuit combines series and parallel sections and typically contains more than one loop. So the circuit with only one loop is the all-in-line, single-path arrangement.

A single closed path for current means electrons have one continuous route to travel from the power source, through every component, and back to the source. In a series arrangement, components are connected end to end in one line, so the current flows through each part one after another and there is only one loop. The same current passes through every component because there’s just this single path.

In contrast, a parallel setup splits the current into multiple branches, giving more than one path back to the source, which means more than one loop. An open circuit has a break in the path, so there isn’t a complete loop for current to flow at all. A mixed circuit combines series and parallel sections and typically contains more than one loop. So the circuit with only one loop is the all-in-line, single-path arrangement.