In order to prevent bar magnets from losing their strength, they are stored wih keepers such that the two bars are placed with

Answer Details

To prevent bar magnets from losing their strength, they are stored with keepers such that the two bars are placed with unlike poles facing each other and the keepers placed at their ends. This is because the magnetic field of a bar magnet flows from one pole to the other. When two magnets with the same pole are placed together, their magnetic fields interfere with each other and cancel out some of their magnetic properties. On the other hand, when two magnets with opposite poles are placed together, their magnetic fields combine and create a stronger magnetic field. By placing the keepers at the ends, the magnetic field of the bar magnet is confined to the magnet itself and doesn't interact with any external magnetic fields, which could cause it to lose its magnetism over time.