Problem 4 (20 points) (Chap 7) (Learning objective: Magnetic field in a straight coil)A cardboard tube is 10 cm long and 5 mm in diameter, with air inside ("air core").100 windings of insulated wire are wound onto the tube, and connected to a 2 A currentsource. Also, 300 windings of insulated wire wound onto the same tube but in the oppositedirection, and connected to a 4 A current source. The two sets of windings are overlapping,but they do not short out because they are insulated. What is the magnitude of the magneticflux density in the coil?

Here is the step-by-step explanation:Given:Length of the coil (L) = 10 cm = 0.1 mDiameter of the…

Answered: Problem 4 (20 points) (Chap 7)…

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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An iron circuit with a small 0.75 mm air gap is shown in Figure 1. A 6000 turn coil carries a current I = 18 mA which sets up a flux within the iron and across the air gap. The cross section of the iron is a consistent 0.8 cm², and the mean length of the flux path is 0.15 m. a) Redraw the magnetic circuit using schematic symbols of an electric circuit with reluctance in each part of the circuit. b) State's Ohm's Law for magnetic circuit. c) By neglecting the effect of fringing, calculate the reluctance of the circuit. d) Find the flux within the core. N = 6000 Iron circuit (ur = 800 for iron).
Question 1 A ferromagnetic core with a relative permeability of 1500 is shown in Figure 2. The dimensions are as shown in the diagram, and the depth of the core is 7 cm. The air gaps on the left and right sides of the core are 0.070 and 0.020 cm, respectively. Because of fringing effects, the effective area of the air gaps is 5 percent larger than their physical size. If there are 400 turns in the coil wrapped around the center leg of the core and if the current in the coil is 1.0 A, what is a) the flux in each of the left, center, and right legs of the core? b) the flux density in each air gap? 7 cm ст ст 30 cm 30 cm 7 cm 400 turns 0.05 cm 30 cm 0.07 cm 7 cm Core depth = 7 cm Figure 2
Please answer a, b, c and d
A solenoid is 1 Cm long with a diameter of 0.5 Cm. The core is SiFe with a relative permeability of 4200. Assuming a current of 100 mA, what is the maximum number of turns for the winding that keeps the core under the saturation magnetic field of about 1.5 Tesla?
A rectangular coil of wire has a length of 3 cm and a width of 4 cm. It is in a 0.004 T magnetic field. What is the magnetic flux through the coil if the face of the coil is parallel to the B-field lines? What is the flux if the angle between the face of the coil and the magnetic field is 75°?
1.Consider the magnetic core below.All dimensions are shown on the figure. The core is made up of legs with 2 different cross-sectional areas.The depth of core is 10cm.The relative permeability of the core is 2000. The current in the magnetising coil is 1 A. The number of turns of the coil is 2000.Calculate: (i)the reluctances and draw the magnetic circuit (ii)the flux in the core (iii)Flux densities B and field intensities H in legs having different cross-sectional areas. (iv)Verify Ampere's Law. Depth: 10 cm I=1A 20cm 2000 Turns 65cm 15cm 15cm 50cm 15cm ndo un of
A simple magnetic circuit is shown in Figure 1. The turn ratio is 250 turns and the current is 3.2 A. 15 cm 25 cm 25 cm N Figure 1: System for Q1 2 cm a) Draw the equivalent electric circuit and find the reluctance of each section. b) Find the total flux at the middle section of the circuit (where the winding is). c) Find the flux density at the right leg of the core
1. What is the relationship between voltage and current when there is saturation in the magnetic circuit? 2. When there is no saturation in the magnetic circuit, what is the relationship between voltage and current? 3. Briefly explain what caused the saturation in the magnetic circuit. 4. What happens to alternating current, alternating current, and alternating magnetic flux in a magnetic circuit when frequency increases? 5. When a magnetic circuit is saturated, explain two solutions that can be used so that the magnetic circuit is no longer saturated.
Please see the attached image.
A 10, 120 V, 60 Hz supply is connected to the coil The coil has 200 turns. The parameters of the core are as follows: Length of core = 100 cm Cross-sectional area of core = 20 cm? Relative permeability of core = 2500 Obtain an expression for the flux density in the core.
A magnetic circuit with a cross-sectional area of 20 cm? is to be operated at 50 Hz from a 120 V rms supply. The number of turns required to achieve a peak magnetic flux density of 1.8 T in the core is
A certain magnetic circuit may be regarded as consisting of three parts, A, B and C in series, each one of which has a uniform cross-sectional area. Part A has a length of 300 mm and a cross- sectional area of 450 mm². Part B has a length of 120 mm and a cross-sectional area of 300 mm². Part C is an airgap 1.0 mm in length and of cross-sectional area 350 mm². The flux in the airgap is 0.35 mWb. Neglect magnetic leakage and fringing. The magnetic characteristic for parts A and B is given by: H (A/m) 400 560 800 1280 1800 B (T) 0.7 0.85 1.0 1.15 1.25 Calculate: i. The reluctance of each part, that is, of Part A, Part B, and Part C ii. The total reluctance of the magnetic circuit. iii. The total m.m.f.

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