Lenz's Law http://physicstoys.blogspot.com/p/physics-toy-store.html A strong neodymium magnet falls slowly down a copper bus bar as though passing through a viscous liquid. Since magnetic fields pass through copper, magneview film reveals the location of the falling dipole magnet. Moving magnetic fields from the falling magnet produce electric currents in the copper. These currents then produce magnetic fields that have the opposite polarity to the initial field. So a falling magnet makes the co

Lenz’s Law Loops Demonstration: a strand of aluminum, curled into a loop at each end, is balanced on a rotation point. A strong neodymium magnet at the end of a rod can interact and manipulate the balanced structure without touching it. Note that the closed loop allows a current to form and flow completely around the loop, whereas the loop with a gap barely interacts. A changing magnetic field (from the point of view of the moving loop) induces an electric current in the loop, which in turn prod