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Basic Electricity Practice Exam

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What term describes a circuit in which electrons can flow from the power source to the load and back?
Correct Answer:
Complete circuit
Explanation:
Current can flow only when there is a closed path for the charges to travel. A complete circuit provides a continuous loop from the power source, through the load, and back to the source, so electrons can leave the source, pass through the load, and return, delivering power in the process. If the loop is broken, no current flows, which is what an open circuit describes. A short circuit is a closed path with very low resistance that bypasses the load, so while current can flow, it doesn’t go through the intended device. An isolated circuit isn’t connected to a power source or load, so no current flows either. Therefore, the term that best fits electrons flowing from the power source to the load and back is a complete circuit.

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