Free Fall Apparatus Economy, for determination of the gravitational constant ft gft, This kit has a wooden base, 1.1m rod and a movable electro magnet, can be moved anywhere on the rod, when the ball is released the timer is triggered and stopped one the ball his landed on the base
Lenz' Law - Open & Closed Loop, Simple, Economical Device, Constructed Of Cast Iron Base And Aluminum Ring, Used To Demonstrate The Induction Of An Magnetic Field, This Teaches Faraday'S Law Of Induction As Well As Lenz' Law.