Magnetism Investigation Roll out a large piece of white craft paper. Lay a bar magnet in the middle of the craft paper. Sprinkle some iron filings around the magnet and observe. Now try the experiment again with a horseshoe magnet instead of a bar magnet. What do the iron filings show you? Now move a magnetic compass to various positions around the magnet. What does the varying position of the compass needle tell you? Set up a simple series circuit and connect it to the power source. Plan a way in which to observe the connection between electric charge and magnetic fields and forces. What piece of equipment should you use? What do your observations illustrate about the relationship between moving electric charges and magnetic fields/forces