What happens when a switch is closed?

What happens when a switch is closed?

• A. It opens the circuit.
• B. It allows current to flow by completing the circuit.
• C. It stops all electrical activity in the system.
• D. It changes the supply voltage.

Answer: (B)

Closing a switch completes the conducting path, letting current flow from the power source through the circuit and back. The switch isn’t generating energy or changing the voltage; it’s simply creating a continuous loop so electrons can move. If the switch were open, the path would be interrupted and current would stop.

Closing a switch completes the conducting path, letting current flow from the power source through the circuit and back. The switch isn’t generating energy or changing the voltage; it’s simply creating a continuous loop so electrons can move. If the switch were open, the path would be interrupted and current would stop.