What is the function of a switch in an electric circuit?

What is the function of a switch in an electric circuit?

• A. A device for making and breaking the connection in an electric circuit.
• B. A device that stores electric charge.
• C. A passive component that limits current.
• D. A sensor that measures voltage.

Answer: (A)

A switch controls whether the electrical path is complete. When the switch is closed, it creates a low-resistance connection that completes the circuit and allows current to flow to the load. When the switch is opened, the path is broken, and current stops. This on/off control is what makes a switch useful for turning devices on and off and for safety. A device that stores electric charge is a capacitor, not a switch. A component that limits current is typically a resistor (or other passive elements like inductors or capacitors in specific configurations), not a switch. A sensor that measures voltage would be a voltmeter or voltage-sensing device, not a switch.

A switch controls whether the electrical path is complete. When the switch is closed, it creates a low-resistance connection that completes the circuit and allows current to flow to the load. When the switch is opened, the path is broken, and current stops. This on/off control is what makes a switch useful for turning devices on and off and for safety.

A device that stores electric charge is a capacitor, not a switch. A component that limits current is typically a resistor (or other passive elements like inductors or capacitors in specific configurations), not a switch. A sensor that measures voltage would be a voltmeter or voltage-sensing device, not a switch.