Gap length: Lg=0.1 cm.
Core length: Lc=70 cm.
Core area: Ac=20 cm2.
Gap area: Ag=40 cm2.
Central limb length: Ll=25 cm.
Calculate the magnetic reluctance:
Rc=μ0μAcLc. Rg=μ0μAgLg. Rl=μ0μAgLl. The magnetic circuit can be calculated like electric circuit, but with flux instead of current and with magnetomotive force instead of voltage:
Φg=RNI=RC/2+Rl+RgNI, I=NΦg(RC/2+Rl+Rg)=0.24 A.
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