Recent content by NB76

I am sorry, I just don't see it (get it).

The power supply will be referenced to ground (see drawing).

I think I am asking a different question. I know the potential on the plane. I hook a power supply to the plane and set a voltage. I don't know the charge on the plane (sigma). How do I get from V (power supply) to sigma?

Thanks NB76 - could you help me put this into a formulaic form? Just to reiterate where I am in this problem. I know the field from a 2-D infinite plane is E = 2 k pi sigma. I don't know how to calculate sigma for an infinite plane held at a fixed voltage V. Can anyone assist with this? With...

Just to reiterate where I am in this problem. I know the field from a 2-D infinite plane is E = 2 k pi sigma. I don't know how to calculate sigma for an infinite plane held at a fixed voltage V. Can anyone assist with this? With the field quantified, I expect the y-position to vary proportional...

Could you give me a more detailed approach to starting this problem?

Sorry for the delayed response. Assume r is the radius of the charged disk form which the electron is ejected (in reality it is a more complicated shape). I don't know the answer. I want to solve the infinite plane problem first because it seems like the easiest problem. If the solution...

Here is a picture if that helps.

How do I find the gradient?

Hi BvU - Thanks for your input. I am interested in electrons in the range of 2-20 eV. The potential on the plane could range form 0 - 100 V.

Thanks Nasu. I am not sure what you mean about the gradient on the plate. Let's say the plate is a conductor, held at fixed potential (relative to ground) with an external power supply. Does that mean the gradient is zero?

Thank you nasu and haruspex! How far does the electron travel is the question I want to answer. If a first pass (infinite plane solution) tells me that the electron is only microns (?) off the surface, maybe the simplification (infinite plane) was justified. If that initial solution result in...

If there is a hint in there it is not obvious to me. What is the field form an infinite charged plane? This is a real problem. The plane is actually 2 cm x 2 cm. I am trying to be flexible in my acceptance of how the problem is set up. If an infinite plane allows for a simple solution I want to...

Homework Statement: Real world application of freshman physics Relevant Equations: TBD This is not a homework question, this is relevant to my work. It seems simple enough (introductory) but I keep running into problems. An electron is emitted from an surface (material is irrelevant, could...