Calculate the reluctance of a magnetic coil which is wounded uniformly on an iron core provided that the relative permeability of the iron is 1400. Also, the length of the magnetic circuit is 70 cm and the cross-sectional area of the core is 5 cm2.

Calculate the reluctance of a magnetic coil which is wounded uniformly

1.	Calculate the reluctance of a magnetic coil which is wounded uniformly on an iron core provided that the relative permeability of the iron is 1400. Also, the length of the magnetic circuit is 70 cm and the cross-sectional area of the core is 5 cm2.
A.	3.6 × 105 AT/Wb
B.	7.9 × 105 AT/Wb
C.	7.9 × 108 AT/Wb
D.	4.6 × 108 AT/Wb
Answer» C. 7.9 × 108 AT/Wb

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Calculate the reluctance of a magnetic coil which is wounded uniformly on an iron core provided that the relative permeability of the iron is 1400. Also, the length of the magnetic circuit is 70 cm and the cross-sectional area of the core is 5 cm2.

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