I don't know the answer. Don't magnets have a polarity, so there must be a neg charge too, right? (http://www.autoadmit.com/thread.php?thread_id=5527770&forum_id=2#47655256)
The polarity cums from the arrangement or paucity of electrons in the body of the magnet. (http://www.autoadmit.com/thread.php?thread_id=5527770&forum_id=2#47655300)