- A magnetic field is the distribution of magnetic force in the region of a magnet.
- North and South are the two different magnetic characteristics. They are responsible for magnetic force.
- Similar magnetic poles (i.e. north and north, or south and south) repel one another.
- Dissimilar poles (north and south) attract one another with a force at a distance.
- To map a magnetic field we need to use a test compass.
-The Earth acts like a giant magnet, producing its own magnetic field. It is suggested that this magnetic field is produced because of the flow of hot liquid metals inside Earth.
- Magnetic forces act on ferromagnetic objects (certain metals that are not magnets.) Some ferromagnetic metals are iron, nickel, and cobalt. They have atomic structures that make them strongly magnetic.
All large magnets are made up of many smaller, and rotatable magnets, called dipoles, which can interact with other dipoles close by. If the dipoles line up, then a small magnetic domain is produced.