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The magnetic field of the earth can rotate a flat coil in its plane. This is explained in Earth’s magnetic field and parallel action. Will a disc magnet rotate a flat coil the same way? The magnetic field of a disc magnet is central symmetric and the field lines are contained in median planes (See Figure 1). If a flat coil is coplanar with a median plane, the Lorentz forces on the currents will be perpendicular to the plane of the coil. So, Lorentz force could not rotate the flat coil in its plane. But in my experiment the coil rotates.
Fidgets & Widgets Reviews:
Review: The Orbiter.
Manufacturer: TEC Accessories.
Materials: 6AI-4V Titanium.
Weight: 48 grams.
*Body Diameter: 1” or 25.4 mm.
*Thickness: 9/16” or 14.3 mm.
*Steel Ball: 5/8” or 15.9 mm diameter.
*Magnets: Neodymium…Keep away from pacemakers and credit
Fidget Type: Spinner.
Spin Times: NA.
Video You Tube Link: https://www.youtube.com/edit?o=U&video_id=7Di74fWfuNk&feature=vm
Physics make this work. The movement is easy to learn. Pinch between your thumb and index finger, place the ball along the side where the magnets are and use a gentle rotating motion. Pick up speed…Rotate the ball clockwise, counterclockwise.
They have a couple of other things you can try with it such as placing the ball near the cup and spinning it faster without the ball falling into the cup or towards the magnet. Those experts out there can try to spin it like a top.
Has a nice weight to it. Easy to carry. Can purchase extra balls for it. For someone like myself…the general fidgeter…this fits the bill. Do not use this in a business meeting for Pete’s sake. It’s not silent. For your office or desk…perfect.
Want to know what I think of the device? I have a basic version which has been modified for color, the recently released alien green version, and the soon to arrive blue raspberry (Massdrop) version.