Magnets exert forces called magnetic forces. Magnets have a north and a south pole. The force of a magnet is strongest at their poles. However, there is a field of force around the magnet. The unlike poles (north/south) attract and like poles (e.g. north/north) repel. Magnets can attract or repel certain materials. A temporary magnetic field is created when electricity flows in a wire. This is called the electromagnetic effect. Our earth also has a magnetic field. We can use magnets to find directions on the earth’s surface.