Date: Thu, 7 Nov 2002 11:02:52 -0500
Author: "Jason St. John"
Subject: Re: mod on eddy current
Cool, Sam! I tried this on a length of aluminum angle bracket we had
lying around, and it was spectacular.
Jason St. John 617.353.2634 email@example.com
Boston University Physics Lecture Demonstrations
On 2002-11-07.10:35 firstname.lastname@example.org sent:
I bought some of those cool NdFeB magnetic spheres for various demos.
Here's a way cooler way to show the Eddy current tube.
First, roll the ball down a long piece of flat plastic. It's not very
spectacular, you get just what you expect. Then roll it down a long
piece of copper. I'm using a piece of 1/8" x 8" x 36" OFHC. The ball
very slowly rolls down the new incline. Repeat this several times until
the copper is vertical. It's just too cool!
The sheet is much cheaper than the thick walled tube, and much lighter