Question

what a magnetic keepers meant for

Answer 1

A magnet keeper, also known historically as an armature, is a paramagnetic 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; ,

Answer 2

a magnet keeper also known as armature is a paramagnetic 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 which have low magnetic coercivity