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previous: GFR Well...When you cha... -- 11/19/1999 10:52 AM

Re: cap crap 2000

11/19/1999 2:49 PM
peter	Re: cap crap 2000 Even with the dielectric there's still no movement of electrons from one plate to the other: the dielectric is an insulator, so the electrons are all firmly attached to the atoms. The polarizability refers to a small displacement of the electrons relative to the atoms, with the result that you get a slight net positive charge on one surface and negative on the other, when you charge the cap. To put this another way, the 'cloud' of electrons around an atom in an insulating material can move a little so that the atom has a small dipole moment (i.e. one end is +, the other -), but the electrons remain attached to the atom. (there, is that confusing enough!!)

11/19/1999 2:49 PM

peter

Re: cap crap 2000

Even with the dielectric there's still no
movement of electrons from one plate to the other:
the dielectric is an insulator, so the
electrons are all firmly attached to the atoms.
The polarizability refers to a small displacement of the electrons relative to the atoms, with the result that
you get a slight net positive charge on one
surface and negative on the other, when you
charge the cap.

To put this another way, the 'cloud' of electrons
around an atom in an insulating material can move a
little so that the atom has a small dipole
moment (i.e. one end is +, the other -), but
the electrons remain attached to the atom.

(there, is that confusing enough!!)

Replies:

Stephen Conner Cap Crap 3000 -- 11/19/1999 3:51 PM