Faraday's Paradox experiment

[gravityblock]

Here's the experiment showing the CEMF induced in the nickel coating does not cause full rotation of the stationary magnet, http://www.youtube.com/watch?v=YASAyhTBeZA

In fact, any CEMF in the nickel coating will oppose the rotation of the magnet on the string, instead of causing the rotation. This is the reason for the slight oscillations with the magnet on the string.  The CEMF never causes a full rotation in this experiment, which means it's not responsible for the many full rotations made easily in the other experiment.  Compare both experiments, and you will see the difference.

GB

[gravityblock]

I agree that the magnets should not rotate each other, and in fact a coating would make no difference. The faces need to be parallel to avoid any change in field intensity that is linking with the opposing magnet.

Magnets are not always perfectly magnetized along it's axis or face, so the faces of the magnets being parallel with each other isn't the correct way to do this.  When two magnets are in attraction to each other and both are freely able to move and orientate themselves relative to each other, then they will both find their own magnetic axis so they will be parallel with each other.

GB

[gravityblock]

I agree that the magnets should not rotate each other, and in fact a coating would make no difference.

I would agree with you under normal circumstances, where there is both an EMF and a CEMF present, which would cancel each other out and give a null result.  But this is not the case, with the experiment where both magnets are suspended by the strings do not generate any CEMF that would normally oppose the rotation of the magnet, thus the stationary magnet will be induced with a net rotation, due to the absence of the field lines disconnecting since there is a lack of tension between their field lines because the field lines of both magnets are rotating with each other at the same relative rpm, which eliminates the tension from them being twisted.  Sorry for the runaway sentence, lol. 

GB

[Rosemary Ainslie]

I would agree with you under normal circumstances, where there is both an EMF and a CEMF present, which would cancel each other out and give a null result.  But this is not the case, with the experiment where both magnets are suspended by the strings do not generate any CEMF that would normally oppose the rotation of the magnet, thus the stationary magnet will be induced with a net rotation, due to the absence of the field lines disconnecting since there is a lack of tension between their field lines because the field lines of both magnets are rotating with each other at the same relative rpm, which eliminates the tension from them being twisted.  Sorry for the runaway sentence, lol. 

GB

I've run this through this rusty mind of mine and actually entirely agree with you GB.  The only possible way the second magnet would move after twisting the first - is if there were some correspondence between the material bodies of those magnets and their flux lines.  Is that right?  Are we missing something?  I'm going to see if I can run the question past an expert.  Interesting that the twist is at a maximum of 90 degrees.  I've hung the magnets from a single thread and it allows for a full 360 degree turn - but am not sure how much spin is the result of the torque in the thread?  Every action has an equal and opposite?  It's the only excuse I can dig up to explain this - unless you've found a way here to disprove that paradox.

Well done.
Rosemary

[gravityblock]

I've run this through this rusty mind of mine and actually entirely agree with you GB.  The only possible way the second magnet would move after twisting the first - is if there were some correspondence between the material bodies of those magnets and their flux lines.  Is that right?  Are we missing something?  I'm going to see if I can run the question past an expert.  Interesting that the twist is at a maximum of 90 degrees.  I've hung the magnets from a single thread and it allows for a full 360 degree turn - but am not sure how much spin is the result of the torque in the thread?  Every action has an equal and opposite?  It's the only excuse I can dig up to explain this - unless you've found a way here to disprove that paradox.

Well done.
Rosemary

That is great you received a full 360^o rotation with the magnets suspended.  I really appreciate your help and effort in this.  It should continue to rotate until the tension in the nylon fibers have enough torque to overcome the tension in the field lines, at which point it will unwind itself. 

I will try to suspend a magnet from the nylon fibers which will be connected to a swivel bearing to avoid and to eliminate any torque from the fibers being twisted due to the rotation.  Assuming the friction of the swivel bearing is less than the torque provided when the nylon fibers were twisted, then this experiment should show a continuous rotation of the magnet which was induced into rotating.

Thanks Rosemary.  Hopefully this will motivate others to replicate this simple experiment, so they can have a better understanding of what is actually happening in these experiments.

GB