Quick link of magnetic levitation <= NEW!
1. 電流的主要效應和電路的基本原理。
2.電流通過時會產生熱。
3.磁場的相互作用。
"The principle behind the motor", and "Making a magnet rotate by using electric current"
magnet1.AVI
explain:
magnetRepulsion.AVI (jumping ring) explain:
