Which circuit would stop current if any section of the circuit is obstructed?

• A. Open Circuit
• B. Parallel Circuit
• C. Series Circuit
• D. Closed Circuit

Answer: (B)

Current needs a complete path to flow. In a series circuit, all components share one continuous path for the current. If any part of that path is obstructed, the circuit is broken and electrons can’t complete the loop, so current stops everywhere. In contrast, a parallel circuit provides multiple paths; blocking one path doesn’t stop the others, so current can continue through the remaining branches. So the type of circuit where any obstruction stops the current is the series circuit. An open circuit is already a break that stops current, and a closed circuit is a complete path; a parallel circuit has multiple paths, which is why obstruction on one path doesn’t halt the entire current.