The permeability of a low-carbon steel is μ=2x10-4 Wb/At.m The shape of this material is a torus (looks like a doughnut), with an inner radius ri=1.75 cm and outer radius ro=2.25 cm. Calculate its reluctance. A. 11.9 x10-4 At/Wb. B. 21.9 x10-4 At/Wb. C. 31.9 x10-4 At/Wb. D. 41.9 x10-4 At/Wb

The permeability of a low-carbon steel is μ=2x10-4 Wb/At.m The shape of this material is a torus (looks like a doughnut), with an inner radius ri=1.75 cm and outer radius ro=2.25 cm. Calculate its reluctance. A. 11.9 x10-4 At/Wb. B. 21.9 x10-4 At/Wb. C. 31.9 x10-4 At/Wb. D. 41.9 x10-4 At/Wb

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

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter12: Electronic Control Devices

Section: Chapter Questions

Problem 14RQ

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Concept explainers

Type of Magnetic Material

Every material has a unique composition that defines its magnetic behavior. Some materials get attracted towards a magnet and are called magnetic materials. Based on the magnetic properties held by each material, they are classified into different types.

Question

The permeability of a low-carbon steel is μ=2x10^-4 Wb/At.m

The shape of this material is a torus (looks like a doughnut), with an inner radius ri=1.75 cm and outer radius ro=2.25 cm.

Calculate its reluctance.

	A.	11.9 x10^-4 At/Wb.
	B.	21.9 x10^-4 At/Wb.
	C.	31.9 x10^-4 At/Wb.
	D.	41.9 x10^-4 At/Wb

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