- #1
FusionJim
- 42
- 11
Is it true that for a charged capacitor with a DC potential across it, the actual surface charge depth is very shallow, just few angstroms or few atomic layers so to speak, because if the plates of a parallel plate capacitor are made from a metal like copper where the free electron number is large these electrons can effectively screen the opposite charge with minimal thickness?
If this is so, then is it true that the surface charge depth/thickness would be actually deeper for a capacitor that is attached to an AC current source and is continually charged and discharged?
I think, I'm asking whether a changing current causes the E field to penetrate deeper into the capacitor plate surface than a static E field would with a steady potential across the capacitor?
Finally, is this also the case for a capacitor that is being physically dynamically changed, like a capacitor where one plate is much larger than the other and the smaller plate is being dragged around the bigger plate at some high velocity , would this cause continual charge redistribution on the larger plate and effectively cause similar effects to the surface charge depth - to increase the depth deeper than if the plates were stationary?
PS. To those that will answer this thread, could you also please look into my other thread in the classical physics category under electromagnetism - the topic is similar but I don't get any answers there :)
If this is so, then is it true that the surface charge depth/thickness would be actually deeper for a capacitor that is attached to an AC current source and is continually charged and discharged?
I think, I'm asking whether a changing current causes the E field to penetrate deeper into the capacitor plate surface than a static E field would with a steady potential across the capacitor?
Finally, is this also the case for a capacitor that is being physically dynamically changed, like a capacitor where one plate is much larger than the other and the smaller plate is being dragged around the bigger plate at some high velocity , would this cause continual charge redistribution on the larger plate and effectively cause similar effects to the surface charge depth - to increase the depth deeper than if the plates were stationary?
PS. To those that will answer this thread, could you also please look into my other thread in the classical physics category under electromagnetism - the topic is similar but I don't get any answers there :)