hello, what is the difference between the flux density of air gap and iron in magnetic circuit.
let say i have an iron ring with an air gap of 1mm. do the air gap and iron ring produce the same magnitude of flux density and flux.
GIVEN:
L of Core=.5 m
Air Gap=10^3 m
N=200 turns
Permeability of iron(uFe)=300
I=1A
Uo=4pix10^-7
find B?
from uNI/L=B ;since B=Hu
therefore we have,NI=BL/u
NI(total)=NI(AIR)+NI(IRON)
(200)(1)=B(.5)/uFexU0 + B(10^3)/u(air)xUo
solve for B;
B=.094247779 Wb/m^2
hope you learn...