S = 0.5 / (4π x 10^(-7) x 1000 x 0.01) = 3980 A/Wb
S_air = lg / (μ₀ * A) = 0.0005 / (4π x 10^(-7) x 0.02) = 1989 A/Wb magnetic circuits problems and solutions pdf
Assuming μr = 1000, we get:
MMF = NI = 200 x 8 = 1600 A-turns
The reluctance of the air gap is given by: magnetic circuits problems and solutions pdf
