What I have up there is just a power source and magnetic field.
The magnets are either sintered or directionally cast, and then annealed in a magnetic field.
Any space at every point of which there is a finite magnetic force is called a field of magnetic force, or a magnetic field.
The strength or intensity of a magnetic field at any point is measured by the force in dynes which a unit pole will experience when placed at that point, the direction of the field being the direction in which a positive pole is urged.
It is clear, moreover, that Oersted clearly recognized the existence of what is now called the magnetic field round the conductor.
