As you drop neodymium magnets down these large diameter, thick-walled copper and aluminum tubes, you can watch them twist and turn as they slowly fall. A moving magnetic field creates a surprisingly strong opposing magnetic field in these tubular conductors. Each tube kit listed below contains a thick-walled Eddy Current Tube and sample neodymium magnets. Please see below for details. The length of the heavy-walled aluminum tube is calculated so that magnets take the same time to fall as the shorter copper tube.
| Material | Approx. Tube Length | Approx. Fall Time | Included Neodymium Magnets | Item Number |
| Copper | 18 cm (7") | 4 sec | 2 rings | ED-100 |
| Aluminum | 36 cm (15") | 4 sec | 2 rings | ED-125 |
| Copper | 1 meter (39") | 24 sec | 2 rings | ED-135 |
Shown with Magnetic Field Viewer Film:
Click here for html version of Eddy Current Tube lesson ideas.