Just came across this video while search for ripple tanks, this would be a great way to teach the youth about simple motor principles. I’m so excited I must try it myself!
What you need
- Copper wire
- Neodymium magnet
- AA battery
..and probably something to bend the wire with.
a brief explanation of what is going on from wiki:
current in the wire is not parallel to the magnetic field, there occurs a Lorentz force that is perpendicular to both. This Lorentz force is tangential and produces a torque in the wire, so that the wire rotates.
Lorentz force? F**king magnets!
The guy’s website that made the video: http://dangerouslyfun.com/homopolar-motor
A Wikipedia article for more information on homopolar motors: http://en.wikipedia.org/wiki/Homopolar_motor
I love the internets – how different my life would be if I had access to it when growing up!