Name: Karl Twelker
I am just beginning a science fair project on
Magnetohydrodynamics used in boat propulsion, and I was wondering what
could be done. I came across a site on the Internet that described a
device that was an open ended box, with on the top and bottom magnets and
the sides electrodes(inside).
The theory was that the electrodes would
attract the ions of Cl and Na in the water, and because of the magnetic
field and electrical field, the particle would have to move out one end
or the other(because of the Right Hand Rule, charged particles must
travel perpendicularly to magnetic and electrical fields. Is this
Not quite. A charged particle in an electric field is going to feel an
acceleration along the direction of the electric field, and this will
remain true whatever else you add to the picture. If that acceleration
makes the charge move in a direction perpendicular to a magnetic field,
then the charge will feel an additional acceleration, proportional to its
speed, in a direction perpendicular to its velocity and to the magnetic field.
The direction is given by the right hand rule.
Reverse the directions of the fields and explain what happens in each of the
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Update: June 2012