· Super Moderator
You do realize magnets pick up (many, not all) shotgun and brass cases hulls due to the steel in the primer?
The copper still isn't magnetic.Drop a neodymium magnet down a piece of straight copper tubing. You will be amazed.
Even most of the shotgun shell** "brass' is really steel.You do realize magnets pick up (many, not all) shotgun and brass cases hulls due to the steel in the primer?
Yes I agree with you. I just think its a neat trick. The tubing becomes an electromagnet which reacts with the neodymium magnet.The copper still isn't magnetic.
The moving magnetic field from the magnet creates an induced current in the copper tubing; where there is (of course) a magnetic field from the current.
If the magnet isn't moving, there is no induced current, and therefore no magnetic field (except for the magnet).