5) The magnetic circuit in the following figure has current 20 A in the coil of 5000 turns. Assume that all branches have the same cross section of 2 cm² and that the material of the core is iron with µ, = 1500. Calculate the reluctance R, magnetomotive force F and magnetic flux Y for (a) The core (b) The air gap-

5) The magnetic circuit in the following figure has current 20 A in the coil of 5000 turns. Assume that all branches have the same cross section of 2 cm² and that the material of the core is iron with µ, = 1500. Calculate the reluctance R, magnetomotive force F and magnetic flux Y for (a) The core (b) The air gap-

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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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

5) The magnetic circuit in the following figure has current 20 A in the coil of 5000 turns.
Assume that all branches have the same cross section of 2 cm² and that the material of the
core is iron with µ, = 1500. Calculate the reluctance R, magnetomotive force F and
magnetic flux Y for
(a) The core
(b) The air gap.
%3D
10 cm-
0.6 cm
12 cm
cm
2 cm

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2. A C-core with a gap of 0.0001m has a coil number of 100 and a current of 10mA. First find the reluctance of the core given that the Iron core has a negligible reluctance and only the air reluctance contributes to the majority of reluctance. The core has a cross sectional area of 2cm². Next find the flux flowing thru the C-core.
In the figure is shown a current of 50 A in a wire 120 cm long and at an angle of 45° to a magnetic field of flux density 6.0 x 10 -4 Wb/m2. What are the magnitude and direction of the force on this wire?
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Q1. Figure 1 shows the magnetic circuit with cross section area of core, 1000 mm2 and current source, 10 mA. By assuming the absolute permeability of core is 2.513x103 H/m, analyze the circuit and determine the following parameters: a. Draw the equivalent Ampere Circuital Law model b. Total reluctance of magnetic circuit c. Magnetic flux at centre and both sided d. Magnetic flux density at centre and air gaps e. Magnetic flux strength at centre and air gaps f. Briefly explain, effect to the magnetic circuit if the length of air gaps keep decreasing and increasing. at 7 cm 30 cm 30 cm 7 cm 7 cm 30 cm 1 cm 400 turns 1 cm 7 cm Figure 1 B-H CURVE BIT) 16 Sheet steel Cast steel 14 12 1.0 08 Cast iron 0.6 04 0.2 H(AUm) 500 1000 1500 2000 2500 3000 3500 4000 4500 5000
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The length of a magnetic circuit in a moving iron instrument is 300mm. The coil around the soft-iron core has 360 turns and takes a current of 1.75 A. The core is square in section with sides of 20 mm. Takethe relative permeability of soft iron as 1100. Determine the flux density
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Explain why do we need a B-H curve when we solve a parallel magnetic circuit in which one of the fluxes is give?
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(b) A ferromagnetic is shown in figure Q3(b). Find the value of the current that will produce a flux of 0.005wb. With this current, what is the flux density at the top of the core? What is the flux density at the right side of the core? Assume that the relative permeability of the core is 1000. The depth of the core is 5cm. The other dimensions of the core are as shown in the figure. 15 cm 500 turns 15 cm 45 cm 5 сm 15 cm 10 cm 35 cm Figure Q3(b)
A magnetic circuit constructed of sheet steel has an average length of 1.5 m and cross sectional area of 0.025 m². A 50 turns coil wound on the ring has a resistance of 0.8 N and draws 4 A from A DC supply. The relative permeability is 5000. Determine a) The flux density. b) Voltage applied. c) If the material is replaced with another material with a relative permeability of 3000 and keeping the other parameters as it is then calculate the new flux and explain what happened. 1.