Re: Lenz's Law?

[Chuck Britton <britton@odie.ncssm.edu>]

> > > > The demos of this that I have seen only send a single pulse of >current
> > > thru 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.
>
> Well, let's see. It has to move, say, 2 cm in that 4 ms. That's an
> average speed of 5 m/s, or a final speed of about ten m/s. How high
> do you suppose the ring would fly if your reckoning were accurate?
>
> Leigh

5 meters, ignoring effects of air resistance, residual resistance etc.
This is indeed a bit higher than observed but not totally out of the ball park.
I've seen 'em hit the ceiling of a large demo room.