Which sequence best represents a complete circuit as described in the material?

Which sequence best represents a complete circuit as described in the material?

• A. Power source, switch, load
• B. Power source, coil, switch
• C. Load, switch, source
• D. Power source and load only

Answer: (A)

A complete circuit requires three things: a source of electrical energy, a path for current, and a device that uses that energy (the load). The switch is what controls the flow, turning current on or off. The arrangement with a power source, a switch, and a load shows all three elements together in the way energy typically moves: energy leaves the source, goes through the switch, reaches the load where it is converted to useful work, and then returns to complete the loop. When the switch is closed, current can flow and the load operates; when opened, the current stops and the load goes off. This setup matches how the material describes a complete circuit and demonstrates both control and consumption in one simple path. The other options either replace the load with something not clearly described as a consuming device (like a coil), omit the switch (removing control), or omit the load entirely, so they don’t align as clearly with the described complete circuit.

A complete circuit requires three things: a source of electrical energy, a path for current, and a device that uses that energy (the load). The switch is what controls the flow, turning current on or off. The arrangement with a power source, a switch, and a load shows all three elements together in the way energy typically moves: energy leaves the source, goes through the switch, reaches the load where it is converted to useful work, and then returns to complete the loop. When the switch is closed, current can flow and the load operates; when opened, the current stops and the load goes off. This setup matches how the material describes a complete circuit and demonstrates both control and consumption in one simple path. The other options either replace the load with something not clearly described as a consuming device (like a coil), omit the switch (removing control), or omit the load entirely, so they don’t align as clearly with the described complete circuit.