Eddy Current Model (Disc) STEM Lab
Product Code : SCL-IMIC-12541
Quick Answer: The Eddy Current Model (Disc) STEM Lab spins an aluminium disc on a low-friction bearing between the poles of an adjustable neodymium magnet, so students can see magnetic braking slow it without contact. A solid disc and a slotted disc are supplied for comparison.
Last updated: October 2026
Key Features
- 1 solid and 1 slotted aluminium disc, interchangeable
- Low-friction bearing hub with knurled lock-nut
- Neodymium magnets on an adjustable caliper with thumb-screw locks to set the air gap
- Cast iron weighted base with powder-coated steel pillar
- Mounting space for a photogate sensor or tachometer
- Net weight approx. 2.5 kg
Technical Specifications
| Specification | Value |
|---|---|
| Discs | 1 solid aluminium, 1 slotted aluminium |
| Magnets | Neodymium permanent magnets |
| Air gap | Adjustable caliper, thumb-screw locks |
| Base | Cast iron, powder-coated steel pillar |
| Net weight | Approx. 2.5 kg |
About This Product
Students first spin the solid disc with the magnet swung away to see how long it runs on its bearing, then spin it again through the magnet gap and watch it stop within moments. Fitting the slotted disc in the same position shows it running much longer, because the slots break up the large eddy current loops, which makes Lenz’s law and the principle of magnetic brakes easy to see. Laboratories and colleges in New Zealand, Honduras, Central African Republic, Eritrea, Latvia and Guyana can buy the Eddy Current Model (Disc) STEM Lab through an export order.
Frequently Asked Questions
Why does the slotted disc of the Eddy Current Model (Disc) STEM Lab spin longer?
The slots interrupt the large circulating eddy currents, so the opposing magnetic force is much weaker than in the solid disc.
Related: Induction, Mutual Inductance Coils, Eddy Current Apparatus STEM Lab and Mutual Induction Model STEM Lab.
For a quotation on the Eddy Current Model (Disc) STEM Lab, contact Educational Instrument.
