Which circuit has more than one path for the current to go through?

• A. Flat key
• B. Series circuit
• C. Parallel circuit
• D. Woodruff key

Answer: (C)

Having more than one path for the current means the circuit provides multiple branches for electrons to flow through. In a parallel circuit, components connect across the same two nodes, creating separate branches. Current can split among these branches, so the total current is the sum of the branch currents while the voltage across each branch is the same. This differs from a series circuit, where all components share a single path and the current is the same through every component. The other options are mechanical terms (keys used to lock gears to shafts) and aren’t about electrical paths, so they don’t describe how current flows. Therefore, the circuit with more than one path is the parallel circuit.