Electromagnetic devices are tools that use electromagnetic principles to function. They typically consist of coils of wire and magnets, which work together to create motion or generate electricity. Common examples include electric motors, generators, and transformers. These devices are essential in various applications, from household appliances to industrial machinery. The operation of electromagnetic devices relies on the interaction between electric currents and magnetic fields. When an electric current flows through a coil, it generates a magnetic field, which can then interact with other magnets or coils. This principle is fundamental to technologies like magnetic resonance imaging (MRI) and electromagnetic relays.