Magnetic Keepers, magnetic lines of force and their properties. Plotting the lines of force Terrestriel magnetism
Magnetic Keepers A magnet keeper, also known historically as an armature, is a ferromagnetic bar made from soft iron or steel, which is placed across the poles of a permanent magnet to help preserve the strength of the magnet by completing the magnetic circuit; it is important for magnets that have a low magnetic coercivity, … Read more