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Question:
I am looking for Information On Magnetic levitation. If there is anyone out There who can give any information at all on this subject. Index Key:



Replies:
Magnetic levitation is simple in principle - there are two ways to do it: place two north poles close together and they repel, so if the higher one is constrained to always be the same orientation relative to the lower one (for example by have a circular magnet with a hole in the middle and a rod through the hole keeping it in place) then the higher one can stay levitated. The second way is using superconductors, which repel small enough magnetic fields (but superconductors work only at low temperatures). Magnetic levitation has been used for a number of high-speed train systems currently under development. Oh - there is a third way to do it - by using attraction rather than repulsion, but that requires a more careful balancing of forces. Try looking in your local library for recent business articles on magnetic levitation, particularly these trains.

Arthur Smith



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