Which term is NOT a type of electrical circuit listed in the material?

• A. Series circuit
• B. Parallel circuit
• C. Series parallel circuit
• D. Open/closed circuit

Answer: (D)

When thinking about how circuits are classified, we focus on how components are connected. Series circuits have a single path for current; parallel circuits provide multiple paths with the same voltage across components; and series-parallel circuits mix those ideas in a combined topology. The terms open circuit and closed circuit describe whether the electrical path is complete and can carry current. An open circuit has a break, so current cannot flow; a closed circuit has a complete loop, so current can flow. These terms describe the circuit’s state, not how the components are wired. Since the material lists circuit types by arrangement, the term that isn’t a type is open/closed circuit.