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This is messing with my head, Faraday Paradox !

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BrianHG:
 :scared:  Why?  The fact that I am seeing DC voltage doesn't make things any better.

See video:


RoGeorge:
The next one shows mechanical rotation instead of DC volts:

Arago's Scheibe,Disk (also see the YT video description)
xofunkox-scientific experiments


And if that was not confusing enough, see the Sagnac effect.  Or look at the humble gyroscope hanged from only one side while it is defying gravity.  Physics is all smoke and mirrors.  This Universe is playing tricks on us, and I know it does, yet I can't evade it.  ;D

BrianHG:

--- Quote from: RoGeorge on February 29, 2024, 08:35:59 pm ---And if that was not confusing enough, see the Sagnac effect.  Or look at the humble gyroscope hanged from only one side while it is defying gravity.

--- End quote ---
Nothing confusing about those for me.  I can easily image the forces going on in my head...

 :scared: But that stupid magnet sitting on the wheel, not relatively moving, and it is still making DC even through the commutators shorted to 2 points on the disc...  |O

ejeffrey:
Despite starting off with "it's still not understood to this day" it provides a pretty clear explanation in the second half of the video.  You have to consider the effect of the leads.

Providing the explanation two ways, once where the magnetic field is though to co-rotate with the magnet and the other without makes it more confusing that it needs to be, but if you pick one it's fine.  The choice is rather meaningless anyway.

ejeffrey:
Also note that the bottom electrode goes to the axle, not the edge of the disc.

If you rotate the bottom electrode so that it passes under the top electrode, then shrink the magnet to only cover the area between the electodes it should be pretty clear what is happening.  The magnetic field in the rest of the disk is then irrelevant. 

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