A device that creates a magnetic field when electric current passes through it. An electromagnet typically contains an iron or steel core with wire wrapped around it. Current is passed through the wire, producing a magnetic field. Electromagnets are used in disk drives to record data onto the disk surface.
Iron bar with coils of wire around it, which acts as a magnet when an electric current flows through the wire. Electromagnets have many uses: in switches, electric bells, solenoids, and metal-lifting cranes.
A temporary magnet made by coiling wire around an iron core; when current flows in the coil the iron becomes a magnet. + prikaži više