Re: Q and water

["davep" <davep-at-xxxxxxxx> (by way of Terry Fritz <twftesla-at-xxxxxxxxxx>)]

Tesla list wrote:
 
> Original poster: "Jan Florian Wagner" <jwagner-at-cc.hut.fi>
 
> > > do you know why the Q of the secondary drops so drastically (as some on
> > > this list noted) when a damp cardboard or other material is stuck inside?
> > Turns out that the "resonance" of water isn't all that signficant in a
> > microwave oven, whereas the plain old conductivity is.  What you've got in
> > the damp cardboard case is a resistor (i.e. damp cardboard) coupled to the
> > coil....
 
> So there should be an electric field also inside the coil?

	Sure.
	And, a mag field.  I suspect the mag field is more troublesome.
	The (contaminated) water constitutes a conductor.  A conductor
	in a varying mag field will have a current induced in it.  If
	its a poor conductor, it will waste energy and heat up.

	best
	dwp