A magnetic switch is an electrical device that uses a magnetic field to open or close a circuit. It typically consists of two components: a magnet and a switch. When the magnet is brought close to the switch, it activates the circuit, allowing electricity to flow. This type of switch is commonly used in security systems, door sensors, and various appliances. These switches are known for their reliability and durability, as they have no moving parts that can wear out. They can be found in applications like home automation, industrial equipment, and automotive systems, providing a safe and efficient way to control electrical devices.