Physical interpretation of Reluctance

[cosmonova]

Hi,

I would like to know what is the physical interpretation of magnetic reluctance.
Also I would like to know why the magnetic flux in a magnetic circuit composed of different magnetic materials should be the same?

Thank you.

[don rigby]

we know from ohms law that: e=i times r
when we consider inductors in circuits with frequencies we substitute r with xc (inductive reactance).
the formula is: Xl (inductive reactance)=2 * pie *f (freq.) * L
the only way "the magnetic flux in a magnetic circuit composed of different magnetic materials should be the same" is if, the inductance of the inductors are the same.
ie: ferrous material # 1 has 10 windings, and this inductance is equal to ferrous material # 2 with 12 windings, as material #'2's permiability is lower.