|A simple but effective device for demonstrating Lenz's Law using
eddy currents induced in the wall of a copper tube by a falling
magnet. The demonstrator consists of a 12" long copper tube
and two apparently identical metal slugs with rubber end caps. One
slug is plain steel, and falls through the copper tube quickly.
The other slug is a strong neodymium magnet that falls very slowly
through the tube due to the braking effect of eddy currents.
Includes tube end caps for storing the slugs in the tube. Also
includes an activity guide.