A magnetic circuit consists of an iron ring of mean circumference 80 cm with cross-sectional area 12 cm2 throughout. A current of 2A in the magnetising coil of 200 turns produces a total flux of 1.2 mWb in the iron. Calculate : (a) the flux density in the iron (b) the absolute and relative permeabilities of iron (c) the reluctance of the circuit [ANSWER: 1 Wb/m2 ; 0.002, 1,590 ; 3.33 × 105 AT/Wb]

A magnetic circuit consists of an iron ring of mean circumference 80 cm with cross-sectional area 12 cm2 throughout. A current of 2A in the magnetising coil of 200 turns produces a total flux of 1.2 mWb in the iron. Calculate : (a) the flux density in the iron (b) the absolute and relative permeabilities of iron (c) the reluctance of the circuit [ANSWER: 1 Wb/m2 ; 0.002, 1,590 ; 3.33 × 105 AT/Wb]

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter8: Basic Electric Motors

Section: Chapter Questions

Problem 3RQ

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