How does an electromagnet work and what are its practical applications?

An electromagnet works by using electricity to create a magnetic field. When an electric current flows through a coil of wire, it generates a magnetic field around the coil. This magnetic field can attract or repel other magnetic materials.

Practical applications of electromagnets include use in electric motors, generators, MRI machines, speakers, and magnetic levitation trains. They are also used in industrial settings for lifting and moving heavy objects, in scrap yards for sorting metals, and in magnetic separators for separating materials.