A magnetic clutch is a device that uses magnetic fields to engage and disengage power transmission between two components, typically in machinery. It consists of an electromagnet and a ferromagnetic disc. When electrical current flows through the electromagnet, it generates a magnetic field that attracts the disc, allowing it to connect with another component and transmit torque. These clutches are commonly used in various applications, including automotive systems and industrial machinery. They offer advantages such as smooth engagement, reduced wear, and the ability to control power transmission without physical contact, making them efficient and reliable in operation.