A permanent magnet is a device that retains a magnetic field without need for a power source. Though many of us have experienced the effects of magnetism from a permanent magnet, very few people can describe what causes permanent magnetism. Explain the cause of permanent magnetism, in your own words.
Find a magnet and bring it with you to class for discussion. Identify as much information as you can about your magnet prior to discussion:
- Location of poles
- Which pole is North, and which pole is South
- Type (metal, ceramic, etc.)
Please be careful to keep any magnets away from cassette tapes, computer disks, credit cards (with magnetic information strips) or any other form of magnetic media!