Activity no. 8. Magnetism1. What will happen to the magnetic strength of a magnet when it is exposed to high temperature?2. Explain the two cases of Ampere's Right Hand RuleProblem Solving.1. A magnetic pole face has a rectangular section having dimensions 200 mm by 100 mm. If the total fluxemerging from the pole is 150µwb, calculate the flux density. Express the flux density in English andCGS.2. The maximum working flux density of a lifting electromagnet is 1.8 T and the effective area of a poleface is circular in cross-section. If the total magnetic flux produced is 353 mwb, determine the radius ofthe pole face.

Every current carrying wire produces a magnetic field. This produces an inductance property. Current…

Answered: 1. What will happen to the magnetic…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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The magnetic structure shown in the figure is built with a material whose magnetization curve is expressed by: (See image with the equation) The length of the mean magnetic path in the core is equal to 0.75 m. The measurements of the cross section are 6 × 8 cm 2. The length of the air gap is 2 mm and the flux in it is equal to 4 mWb (in the direction indicated in the Figure). Determine the number of turns in coil B. Ans: NB =1,237 turns (I need the procedure)
a) A single conductor of length 40 mm is positioned at a 30° angle to a magnetic field of density 300 mT. The conductor experiences a force of 30 µN. What is the value of the current flowing in the conductor? b) Calculate to find the magnetic flux density if a flux of 40 µWb passes through an area of 2 cm2
A bar of iron is said to be saturated once most of its magnetic molecules are aligned, whereby, increases in magnetomotive force results in smaller and smaller increases in flux in the core. a) true b) false A bar of iron is said to be saturated when it is magnetized to its practical maximum state. a) true b) true The magnetism which remains in a core once the external magnetomotive force has been removed is called a) saturation b) residual c) permeability d) none of the above
a. Find the current I required to establish a fluxφ = 2.4 × 10−4 Wb in the magnetic circuit ofFigure. Here area (throughout) =2 × 10−4 m2, lab = lef = 0.05 m, laf = lbe= 0.02 m, lbc = ldc, and the material is sheet steel. b. Compare the mmf drop across the air gap to thatacross the rest of the magnetic circuit. Discuss yourresults, using the value of μ for each material.
The magnetic circuit of the Figure is built with a material, whose magnetization curve is given by: (See image with the equation) The section of the central column is worth 50 cm 2 and the rest is uniform and has a value of 25 cm 2. If N 1 = N 2 = 360 turns, calculate the value of I1 = I 2 to produce a flux of 5 · 10 -3 Wb in the air gap. Ans: 11.32 A. (I need the procedure )
a. If the material is the ideal material, N1I1 = 200, NIA = 100 and NIB = 150 If I am ampersand, what is the flux density in the middle of the air gap? okay? Calculate by drawing the magnetic circuit. b. If the material is not the ideal material (µr), the core material of each winding Find the inductance in terms of parameters c. What is mutual inductance between windings? D. Check the magnetic equivalent circuit of this system that there are no leakage fluxes. draw assuming. New magnetic with leakage fluxes in mind How about a circuit, draw?
Given a magnetic circuit with a current 2.6A flowing through 205 turns of wire on a core having a reluctance of 125000 At/Wb. Determine the magnetomotive force of the circuit in base units.
An iron ring of mean length 50 cms has an air gap of 1 mm and a winding of 200 turns. If the permeability of iron is 300 when a current of 1 A flows through the coil, find the flux density.
Apply the concepts of magnetostatics to compute magnetic field intensity of a long, straight wire carrying a correct of 1 A at a distance of 5 meter meter from it. 8)Analyze the boundary value conditions in the illustration given below and frame the equations in terms of magnetic flux density Medium 1 AS(a,) Ah2 Ah/2 ar AS(-aN) BN2 Medium 2
Find the numerical values of the magnetic field created by the L length wire piece with constant I current flowing through it at the P points shown in the figures below (I=10A, a=20cm)
1. A coil of inductance 0.2 H and 1 ohm resistance is connected to a 90V source. What is the current when it is growing at a rate of 100 A/s? 2. If a permanent magnet has a uniform flux of 14,000 lines between the pole faces, what must its area be to have a flux density of 7,000 gauss, in square inch?
A magnetic pole face has a rectangular section having dimensions 200 mm by 100 mm. If the total ﬂux emerging from the pole is 150 µWb. a) If the emerging flux of the pole is changed to 100µWb what will be the resultant density?c) When the dimensions of the magnetic pole are changed to 10m and 5m what will be the new density?d) What would happen if the magnetic pole is changed to square?

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