What produces magnetic fields?
Magnetic fields are produced by moving electric charges. 6. What are magnetic domains? Magnetic domains are microscopic regions where the atom’s electrons are spinning in the same direction giving the region an overall magnetism. 7. How can permanent magnets be made? Permanent magnets can be made by placing the Fe, Ni, or Co in the presence of a strong magnetic field (like wrapping it with current carrying wire) for a period long enough to align the domains. You can also heat it or strike it in the presence of a strong magnet. 8. What is the reason a magnet can attract an unmagnetized nail? The magnet realigns the domains in the unmagnetized iron nail in the same direction as the magnet forming an opposite magnetic pole in the nail nearest the magnet, so they attract. This is true for refrigerator magnets temporarily magnetizing the refrigerator door under the magnet so they two are attracted. This process is called magnetic induction. 9. To create a magnetic field around a wire there
