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. Item includes tube end caps for storing the slugs in the tube and an activity guide.
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