Just finding a way to cause the cylinder to rotate was my basic issue. I was thinking primarily of a set o torques or forces but this certainly is a more direct method.
Thanks for those valid suggestions. I'm not looking at anything related to gas centrifuges; it is more related to understanding some force/torque configurations with some possibly useful configurations.
I was thinking of sensitive optics to see if it is rotating. And of course in principle this could make it rotate, essentially using the momentum of photons. But this effect is so small its not really a useful solution.
Suppose we are give a homogenous hollow cylinder or "normal" dimensions (for example 3" inside dia., 4" outside dia., 5" high". The composition is any non-exotic, non-magnetic, solid material. Is there any way to cause it to rotate about its vertical axis? Whatever the material is, any...
What I am proposing is that the secondary current is always 1 A DC. No matter what happens in the primary we manipulate the circuitry attached to the secondary so the current is always 1 A. Under those conditions is the response of the primary to input voltage/current (dynamic impedance) any...
We have an ideal electrical transformer, 1:1 turns ratio. We can ignore winding resistance, core losses, hysteresis, core saturation, etc.
Call the primary P and the secondary S. The secondary is connected to a programmable voltage generator and to a resistance R in a simple series circuit...
If you take a bar magnet and place a wire with current a short distance from the end, Lorentz's law can be used to accurately predict the location and magnitude of the resulting forces. The same is true if you use a large volume uniform magnetic field to create an induced field in a bar ferrite...
Yes, there is no force on the ferrite when the current is zero. The ferrite is just in a uniform field. I agree the circular magnetic field from the wire in the current must be at least partially responsible for the forces we see on the ferrite. But deriving a quantitative relationship to...
I don't know why this is true; I would like to understand what is going on. I expected the ferrite cylinder to shield the wire so there would be no force on the wire, as I'm pretty sure it does. I didn't expect a force on the cylinder.
Yes, I have changed the current in most of the experiments. The force change on the ferrite seems to be directly proportional to the current for the currents I was using. Changing current direction changes the force direction. I would guess at very high currents the ferrite could be...
I agree the experimental conditions are far from ideal, but the results I describe have been repeated with numerous set ups and instruments, and with a lot of checking for errors. A ferrite cylinder with a hole through it lengthwise, placed perpendicular to a uniform field, shows 0 field...
When I mathematically subtract the original uniform field from the total (vector) field the result is a varying field that is close to what you would expect from the ferrite itself if it were an isolated magnet.
The force direction on the ferrite coincides with what theory predicts for the wire...
I create a "uniform" magnetic field over a small volume with two 4 x 6 x 1 inch magnets. I have used other somewhat smaller sizes also. Over the volume of interest the field is approximately 50 gauss plus or minus about 2 to 4 gauss.