A long length of wire is wound around a frame lots of times, until it forms a coil like the one shown here. It can be seen that the current goes down through the magnetic field as many times as there are turns on the coil. Each individual length of wire going through the field gets its own little push. When the pushes are added together, you can generate alot of force. Of course, coils don't have to be rectangular like this one.
Circular coils are very common too.
Last updated 3rd June 2000. Copyright protected on all pictures and words except where stated.