On this day in history, Columbus discoveredâ¦. the perfect meatball wink emoticon. Little known fact: Also on this day he discovered Spaghetti Warehouse and their $6 World Famous Spaghetti & Meatball Entree with sourdough bread and choice of soup or salad!
Relevance. Rating Newest Oldest. Best Answer: In a generator, residual magnetism, also known as 'remanence' or remanent flux, is due to the hysteresis of the magnetic material in the core. When the current is removed, the magnetic flux often remains at some non-zero value. This is a characteristic phenomenon of ferromagnetic materials.
  Magnetism is not an energy in itself. Magnets have a force, and if that force is used to move an object over a certain distance, the energy is called work. If energy is â¦ used to hold an object attracted or repelled by the magnet from moving, then there is potential energy stored in the held object/magnet system.