Does the force between 2 charges change due to a wall between them?
I am coming from a background in Thermal/CFD engineering (modeling) and am a novice at electric and magnetic fields and related subjects. So this may be a very basic or obvious question but I am not able to figure it out. Any explanation/guidance would be greatly appreciated. I am trying to figure out if my understanding is correct from my studies and clarify a few points.
Consider 2 points at A and B with charges Q at each of them. 780
Let the distance between them be 'r'. Let us assume there is no medium between them.
Figure_i questions
a) Is the force on the charge at B calculated by coulomb law?
b) Am I correct in my understanding that electric field 'E' at point_B is equal to the displacement field D (which would be equal to electric flux density)? (note:I am not sure if this depends on the charge at B so let us assume there is no charge at B)
Figure_ii questions
Now, if a conducting wall of thickness 't' and infinite length is placed in between the 2 charges. c) Is the 'net' electric field inside the wall is zero?
d) Am I correct in understanding that the electric displacement field 'D' at point B is same at that in Figure_i?
e) Is the force and electric field E on the charge at B be the same or different from Figure_i? If the field E is different how to calculate it and will it depend on the relative position of the wall (i.e. nearer to point A OR nearer to point B)?
Figure_iii questions
Now let us consider the wall from figure_ii is replaced by a dielectric wall of the same thickness 't' and of infinite length.
f) Am I correct in understanding that now there is a 'net' electric field inside the wall given by $$\frac{D-P}{\epsilon}$$ where P is the polarization and $\epsilon$ permittivity of the dielectric wall?
g) Will the force at point B be the same as that in figure_i?
Thank you. 903