On Feb 11, 3:02*pm, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote:
Dave__67 fired this volley in news:73a26711-3806-
:

Hold disk still and spin the magnets around the disk (exact converse
of first case)- no current.

I think you entirely missed the point on that one. *The pickup (the
brushes) have to remain fixed relative to the magnets in order to see the
potential in the disk. *The potential is only developed under the magnet.