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What is an electromagnet?
Any conductor carrying an electric current induces a magnetic field. If the conductor is wrapped around an iron core, the magnetic field produced can be used for many uses. … Most people have seen scrap-yard magnets used for picking up iron and steel scrap. Electromagnets are also used as electrical relays, speakers, mechanical movements, and metal separators in industry. There are thousands of other uses for this very useful device. A simple electromagnet is constructed by winding a wire around a cylinder (e.g., empty thread spool) and attaching the ends of the wire to the poles (+ and -) of a battery. An electromagnet is a coil of wire wrapped around a metal core several times. The individual magnetic fields of the individual wires reinforce and strengthen to form one large magnetic field. ( Full Answer )