- #1
Zorodius
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If I have a charged insulating hula-hoop with the property that every point on the ring has exactly the same charge per volume as every other point on the ring, and I spin it around its axis, does that produce a current?
If I consider a "window" cutting through some part of the ring, I will see charge carriers moving through that window, so I'd think there is a current.
But if I consider any segment of the ring of infinitesimal length, dQ/dt = 0 at all times, so I'd think there is not a current.
Which is right?
If I consider a "window" cutting through some part of the ring, I will see charge carriers moving through that window, so I'd think there is a current.
But if I consider any segment of the ring of infinitesimal length, dQ/dt = 0 at all times, so I'd think there is not a current.
Which is right?
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