Science Magic You Can Do : Eddy's Current Tube

19 October 2020 Zakry MS

What?

When you see this in real life, it literally looks like you're watching a movie special effect! Jeff Evans demonstrates how a powerful magnet seems to fall in slow motion through a copper tube due to eddy currents created in the tube due to Lenz' Law.

How?

You will need a copper or aluminum tube and a neodymium magnet able to fit inside the tube. In the video Jeff uses sphere-shaped magnets, but you can use disc, cylinder, or rectangular shaped magnets as well. Tip: the closer the fit between the inside wall of the tube and the magnet, the better the effect. Also, tubes with thicker walls are more effective. The tubing and magnets can frequently be found at hardware stores.

Credit : Edumazement Productions (Jeff Evans)

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