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How do you monitor the difference between room temperature and LNThe cold ring flys further, faster, showing a greater current =>
temperature currents?
greater opposing magnetic field.
The demos of this that I have seen only send a single pulse of >currentthru the coil, making the Lenz's Law explanation more >beleivable.
Since the ring goes flying high at the onset of the switch, wouldn't this
qualify as the effects of a single pulse?
I reckon the ring leaves the pole in less than 4 ms or so, before
the next half cycle has a chance to complicate things.