An iron magnetic circuit has uniform cross-sectional area of 5 cm^2 and a length of 25 cm. A coil of 120 turns is wound uniformly over the magnetic circuit. When the current in the coil is 1.5 A, the total flux established is 0.3 mWb. Determine the relative permeability of the iron.

An iron magnetic circuit has uniform cross-sectional area of 5 cm^2 and a length of 25 cm. A coil of 120 turns is wound uniformly over the magnetic circuit. When the current in the coil is 1.5 A, the total flux established is 0.3 mWb. Determine the relative permeability of the iron.

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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Question

9. An iron magnetic circuit has uniform cross-sectional area of 5 cm^2 and a length of 25 cm. A coil of 120 turns is
wound uniformly over the magnetic circuit. When the current in the coil is 1.5 A, the total flux established is 0.3
mWb. Determine the relative permeability of the iron.

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