Measuring Amps on output coils

[MileHigh]

There is no magnetic field surrounding a super conductor.

If I recall correctly there is no magnetic field inside a superconductor.  But of course there is a magnetic field outside a superconductor.

Put a "black box" around the superconducting wire.  So what do you have?  All that you know is that current is flowing through the black box.  Therefore outside the black box there is a magnetic field.

[MarkE]

There is no magnetic field surrounding a super conductor.

That's just wrong.  The Meissner Effect causes a super conductor to reject all external magnetic fields from penetrating inside the superconductor.  The fields inside and outside are very real and very useful, or at least entertaining.  Here is a very fun instructive demonstration by the Royal Society.  https://www.youtube.com/watch?v=zPqEEZa2Gis  Here is another fun demo:  https://www.youtube.com/watch?v=VyOtIsnG71U.

[TinselKoala]

And here's my demo of an interesting effect using a superconductor and a magnet:

http://www.youtube.com/watch?v=JRby1Wilv-Q

[MarkE]

And here's my demo of an interesting effect using a superconductor and a magnet:

http://www.youtube.com/watch?v=JRby1Wilv-Q

I always enjoyed that demonstration.

[TinselKoala]

I always enjoyed that demonstration.

Yes, it's a good one and leads-out much thought and speculation.

One question that immediately arises is this: Does the magnet always wind up rotating in the same direction or sense?
No... it does not. It can rotate in either direction once it gets started.

I have also done the experiment using a larger disc magnet, about the size and shape of a US quarter-dollar coin, completely
wrapped in copper foil. My thinking was that this should help to equalize any thermal gradient across the magnet. It still rotates.

The superconductor is a YBCO type, melt-textured and sintered, prepared according to formulae and directions from Eugene Podkletnov.