1001 Space Earth Nature History Human World Science and Technology Chemistry Materials Force and Energy Heat and Light Electricity and Magnetism Industry Machines Electronics and Computers Cars and Trucks Railways Ships Aircraft Fishing and Agriculture Undersea Exploration	How does an electromagnet work? An electric current flowing along a wire creates a magnetic field around it. If the wire is wound into a coil, the fields combine to give a field like an ordinary magnet's. A piece of iron in the centre of the coil makes the field stronger.   Previous: Back Book: 1001 Section: Science and Technology Chapter: Electricity and Magnetism