jonathand1000
New Member
Hi,
Just re-reading some basic stuff in books, and came across this passage (about a capacitor charging):
"If [x happens], a positive potential is applied to the upper plate of the capacitor; this causes the orbits of the electrons in the molecules of the dialectric to become eliptical so that they orbit nearer to the upper (positive) plate of the capacitor. The movement of electrons in the dielectric repels electrons away from the upper plate and into the external circuit; the movement of these electrons constitutes current flow in the circuit"
OK, the bit I don't understand is the bit about the eliptical electron orbits. If electrons are flowing into the 'upper' plate of a capacitor, surely this would *repel* electron orbits in the dielectric? I thought that the reason a capacitor stopped charging and current then flowed 'over the top of it' was to do with the balance betwen repulsion of electrons already stored on the positive plate and emf.
Actually, it would really help if someone could explain to me what an electrical flux is. That would be great if you could. I have never really got the hang of what flux is except that one is established in the dielectric when voltage is applied over a capacitor.
Thanks alot in advance,
Jon
Just re-reading some basic stuff in books, and came across this passage (about a capacitor charging):
"If [x happens], a positive potential is applied to the upper plate of the capacitor; this causes the orbits of the electrons in the molecules of the dialectric to become eliptical so that they orbit nearer to the upper (positive) plate of the capacitor. The movement of electrons in the dielectric repels electrons away from the upper plate and into the external circuit; the movement of these electrons constitutes current flow in the circuit"
OK, the bit I don't understand is the bit about the eliptical electron orbits. If electrons are flowing into the 'upper' plate of a capacitor, surely this would *repel* electron orbits in the dielectric? I thought that the reason a capacitor stopped charging and current then flowed 'over the top of it' was to do with the balance betwen repulsion of electrons already stored on the positive plate and emf.
Actually, it would really help if someone could explain to me what an electrical flux is. That would be great if you could. I have never really got the hang of what flux is except that one is established in the dielectric when voltage is applied over a capacitor.
Thanks alot in advance,
Jon