A point between 2 magnets, what remains constant at that point?

[ugenetic]

a fixed spatial point between 2 fixed magnets. if I place different blocks of material on that point, is the H that will remain the same? or is it the B? or just the MMF (magnetic motive force), while B and H will always change depend on the material placed?

the same question for E, D, and EMF between 2 fixed charges.

thanks

 

[ugenetic]

I am sorry, I don't understand, was the question itself too naive? but I m just asking for a "yes" or "no" really. I was trying to understand the medium independent, fundamental driven force of E or M field.

 

[Meir Achuz]

It depends on the shape and orientation of the material.
Usually, both B and H will change in the vicinity of the material.

 

[ugenetic]

And, both B and H will change at the point of interest INSIDE of the material as well right? The same applies for E and D too right?

So, none of B or H or E or D are "fundamental qualities". Only the EMF and MMF are. Meaning: only MMF ( N*i) is the fundamental "driver", while B and H will vary with the properties of different materials.

I was looking at a solenoid with an iron core inside. the iron core has an air gap inside. once the MMF was turned on, a constant flux will flow thru the core and air gap (ignore fringing), so B's are the same for air gap and core but H's are different.
I am guessing some similar situations would apply for E and D as well. D will remain the same thru out different materials but E actually varies.

 

[sardar]

At a fixed spatial point between two fixed magnets, the magnetic field strength (B) will remain constant. This is because the magnetic field is a property of the magnets themselves and is not affected by the material placed between them. The magnetic motive force (MMF) will also remain constant, as it is determined by the strength and distance between the magnets.

Similarly, at a fixed point between two fixed charges, the electric field strength (E) and electric displacement (D) will remain constant. These are properties of the charges and are not affected by the material placed between them. The electromotive force (EMF) will also remain constant, as it is determined by the charges and their distance from each other.

In both cases, the material placed between the magnets or charges may affect the overall strength of the magnetic or electric field, but the specific values of B, H, E, D, MMF, and EMF at a fixed point will remain constant.