I feel like I'm shooting a squirrel with a howitzer asking my question on the physics stack exchange, but here goes...
I have a long ring-shaped (1cm outer dia x 3cm length) rare earth magnet that I want to have move through a brass tube, moved by a magnet a few mm from the outside of the brass tube. The magnet has a steel screw going through the middle of the ring that attaches to something else. The magnet is polarized along the length of the magnet.
- Is the steel screw that runs through the center of the magnet reducing the strength of the magnetic field?
- Will putting a steel plate behind the brass tube (perpendicular to the polarization) increase the strength of the magnet system? I know that putting a metal plate on one pole of a magnet will increase its strength.
Thanks for your help. I'm a real dunce with physics, assume it's magic.
Edited to address the below question: I'm trying to build a spring-loaded magnetic latch. See a diagram below of the latch. To release the latch, I hold a magnet outside the brass tube so that it attracts to the magnet inside, and then I move the magnet to the right. This moves the screw out of the hole in the catch plate. I want to maximize the amt of force I get from the magnets so that I can use a pretty stiff spring (in order to ensure that the latch stays securely closed when not being opened.)