DESCRIPTION:
The animation shows the magnetic field configuration
around a conducting non-magnetic ring (e.g. copper)
as it falls under gravity in the magnetic field of a
fixed permanent magnet. The current in the ring is indicated
by the small moving spheres. In this case, the ring
has finite resistance and falls past the magnet. The
motions of the field lines are in the direction of the
local Poynting flux vector.
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