Date: Thu, 7 Nov 2002 11:02:52 -0500

Author: "Jason St. John"

Subject: Re: mod on eddy current

Post:

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 stjohn@bu.edu
Boston University Physics Lecture Demonstrations

On 2002-11-07.10:35 owner-tap-l@listproc.appstate.edu 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
too.

Sam

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