The pole of the magnet that seeks the north pole is called the north pole of the magnet, while the opposite side is the south pole. When a ferrous material is placed in a magnetic field, the domains l...The pole of the magnet that seeks the north pole is called the north pole of the magnet, while the opposite side is the south pole. When a ferrous material is placed in a magnetic field, the domains line up with the magnetic field so that the north poles are all pointed in the same direction and the south poles are all pointed in the opposite direction.