A switch is an electrical device used to control the flow of electric current in a circuit by either completing or breaking the circuit.
Main functions of a switch:
- Turning current ON (Closed circuit)
When the switch is closed, it completes the circuit, allowing current to flow and the device to operate.
- Turning current OFF (Open circuit)
When the switch is open, it breaks the circuit, stopping the flow of current and turning the device off.
- Safety control
Switches help prevent electrical hazards by allowing users to quickly disconnect power when needed.
- Energy saving
By controlling when devices are on or off, switches help reduce unnecessary electricity consumption.
Types of switches:
- Manual switches (used in homes)
- Automatic switches (used in advanced systems and protection devices)
In simple terms:
A switch acts like a control gate that starts or stops the flow of electricity in a circuit.