Electric/Magnetic field/flux/flux Density summary

[ugenetic]

The original post was worded in such a horrid way, probably no one understood what I was asking, I am retyping the questions:

Imagine a fixed point in space. that point is between 2 fixed magnets of any strength and orientation as long as some magnetic field is "passing thru" that point.

another scenario for E field : imagine a fixed point in space between 2 fixed charges. Some E field passes thru that point too.

Now, with different materials placed on that point, I would like to know if all my conclusions below are correct:
[1] EMF, MMF (or dEMF, dMMF)at that point will remain the same no matter what, because EMF MMF are "drivers". "drivers" only relates to the source not the medium

[2] B and D will remain the same, no matter what material is placed on the point. because drivers causes flux. But I am clearly wrong, because flux does require MMF or EMF to divide medium. But how do you get constant flux at a point regardless of material placed on that point?

[3] then H and E will have to be different for different materials ( materials with different mu and epsilon respectively). because if flux densities remain constant, H and E has to change according to material.Or is it other way around?
I am asking, because when I studied magnetic circuit, ie. a toroid, I found in horror that, within a toriod, the B is constant thru out the material. but the H's are different when in the core and when in the air gap. The same situations can be found in D and E cases: D will be same across different materials, but E will be reduced in dielectric materials.

 

[Vailanor]

All these conclusion of mine, are they true or wrong?Your conclusions are mostly correct. EMF and MMF remain the same regardless of the material because they are driven by the source, not the medium. B and D will remain the same regardless of the material, but H and E will be affected by different materials due to the different permeability and permittivity of the materials. In a magnetic circuit, B is constant throughout the material, but H will be different in the core and in the air gap. Similarly, D will be the same across different materials, but E will be reduced in dielectric materials.