| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device for showing a mysterious phenomenon such as making a magnet float by using electromagnetic induction since the phenomenon of an object floating by electromagnetic forces is mysterious and interesting. Ž<P>SOLUTION: In a circular tube made of a material which is not attracted to a magnet and has high electric conductivity, a strong magnet such as a neodymium magnet is put. By spinning the circular tube, the magnet can be made to float in the tube by electromagnetic induction. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
