Tuesday, January 22, 2013

An electromagnet is a device consisting of an iron or steel core which is magnetized by electric current flowing through an enamel-insulated copper coil wound around it. The strength of the magnetic field thus produced will depend on the number loops that make up the coil; the more the number of turns of copper wire, the stronger the magnetic field will be. Large electromagnets are used to lift heavy steel materials or scrap iron.