- #1
GhostLoveScore
- 149
- 9
We have this situation
an electron comes flying in electric field between two capacitor plates. Let's say that voltage is 12V and distance between plates is 1m. Electric field E=U/d=12V/m. Plates are connected to the battery just initially. The battery is later disconnected.
If electron comes flying in right in the center, between the plates, electric field accelerates electron and gives it some energy. Kinetic energy of the electron in the "y" direction is now Ek=E*q*d/2
Now I have one question.
If the electron doesn't hit positive plate, that means that energy from the field was transferred to electron and if we would continue accelerating electrons the field will obviously lose energy and it will have to weaken and disappear? So where have all the electrons from negative plate gone?What if the electron hits the positive plate? That means that it will return it's energy back into the positive plate. But if it hits positive plate it will reduce positive charge on that plate. That would mean that it will again weaken the electric field between two plates. I know there is a catch here, but I can't see it.
EDIT: correcting an equation
an electron comes flying in electric field between two capacitor plates. Let's say that voltage is 12V and distance between plates is 1m. Electric field E=U/d=12V/m. Plates are connected to the battery just initially. The battery is later disconnected.
If electron comes flying in right in the center, between the plates, electric field accelerates electron and gives it some energy. Kinetic energy of the electron in the "y" direction is now Ek=E*q*d/2
Now I have one question.
If the electron doesn't hit positive plate, that means that energy from the field was transferred to electron and if we would continue accelerating electrons the field will obviously lose energy and it will have to weaken and disappear? So where have all the electrons from negative plate gone?What if the electron hits the positive plate? That means that it will return it's energy back into the positive plate. But if it hits positive plate it will reduce positive charge on that plate. That would mean that it will again weaken the electric field between two plates. I know there is a catch here, but I can't see it.
EDIT: correcting an equation
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