Date: Thu, 07 Nov 2002 10:20:02 -0700

Author: "Zigmund J. Peacock"

Subject: Re: mod on eddy current


Sammy my boy, you can't roll it toward an edge like you can a cylinder.
Reason a cylinder is self correcting and will not roll of the edge of
plate unless it starts at an extreme angle [45 or so comes to mind].
Now thats cool. Zig

Sam Sampere wrote:

> 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

Zigmund J. Peacock

University of Utah/Physics
115 SOUTH 1400 EAST #201 Tel 801 581 6602
SALT LAKE CITY UT 84112-0830 Fax 801 581 4801

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