Phys216 lab 6

What is the concept of the magnetic circuit? Give examples of DC analysis of magnetic circuits

A magnetic core in the form of a closed circular ring has a mean length of 30 cm and a cross sectional area of 1 sq cm. Determine the reluctance if the relative permeability of iron is 2400

Consider the magnetic circuit in figure. current of (3A) flows through 200 turns of wire around a core of cross sectional aea of 0.24 (m) 103 m? and a relative permeability of 5000. 2 (mm) a) Determine the magnetic flux in each leg b) Determine the magnetic field intensity in the air gap -0.2 (m) 0.2 (m) c) Determine the magnetic force on the across the air gap

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Question 4b Magnetic fields are characterized by the existence of a detectable magnetic force at every point in the region or simply know as magnetic poles. Describe in detail ONE of its applications in industry by including a related picture or diagram of such application.

compute the reluctance of the magnetic circuit

Magnetic fields are characterized by the existence of a detectable magnetic force at every point in the region or simply know as magnetic poles. Describe in detail ONE of its applications in industry by including a related picture or diagram of such application.

6) a) Current is generally defined with respect to ...b) Current in a wire is defined with respect to ...c) Derive how much current flows through a closed surface in the magnetostatic case. d) Derive magnetic flux through a closed surface for a non-magnetostatic case.

Write one or two paragraphs that explain the voltage–current relationship of an inductor in terms of basic principles of magnetic fields.

Division: Elctronic Eng. Subject: Energy conversion I Year : Second Q1/ A / Discuss B-H curve of a ferro-magnetic material . B / Define the following terms (any three) : (i) MMF (ii ) magnetism. (iii ) Reluctance (v) flux density Q 2 A magnetic circuit has the mean length of flux path of 20 cm, and cross sectional area of 1 cm?. Relative permeability of its material is 2900. Find the mmf required to produce a flux density of 2 tesla in it. If an air gap of 1 mm is intro gap as a fraction of the total mmf to maintain the same flux density. luced in it, find the required the air

Write and explain the three groups of materials according to their magnetic properties? What kind of values is expected for their magnetic permeability?

help me provide a picture of a device that is used everyday with the concept of this image. And explain the mechanism and principles of the device's operation

Explain the difference between magnetic and nonmagnetic materials and give example of each.

State the boundary conditions for electric field and magnetic field in terms of the tangential and normal components (statements and equations).

Q2 (a): What is magnetic phase transformation? Discus and plot the phase transition from para to ferromagnetic. (b): Draw a magnetization curve of different feromagnetic materials and also discuss why different feromagnetic materials have different saturation levels.

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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 0.5-m length of wire carries a 10-A current perpendicular to a magnetic field. Determine the magnetic flux density needed so that the force on the wire is 3 N.

These are questions about magnetic properties of a material: 1. How are carrier concentration and mobility calculated measured for materials?2. What is the Gouy’s method to measure magnetic susceptibility?3. What are the limitations in the electrical and magnetic measurements in materials?

Q4// A ring of a mean diameter 30 cm and cross sectional area of 15 cm2 is made up of semi – circular sections of cast iron and cast steel. If each joint has an air gap of 0.25 mm. Find amper turns required to produce a flux of 7 x 10 weber in the magnetic circuit. The relative permeability of steel and iron are 852 and 165 respectively. - OA- Amper turns required= 1105 OB- Amper turns required= 1995 OC- Amper turns required= 2250 OD- Amper turns required= 3150 OE- None of above ارسال الاجابة

Explain the hysteresis that can be found in materials due to force, magnetic and electrical subjection (give an example on two different materials below)   show and explain the hysteresis curves for these materials.  1)High carbon steel 2)Cast iron

The relative permeability of a certain silicon steel is 4500. A certain magnetic loop consists of a silicon steel of 10 cm square, 20 cm long and an air gap of 0.25 cm. Find the reluctance of the magnetic circuit.

Explain briefly why in any series magnetic circuit (or series brancho of a magnetic circuit) containing an air gap, the greatest magnetic-potential drop occurs across the air gap.

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9. An air gap measuring 1.5 mm is cut in the magnetic ring with a mean radius of 10 cm and a cross section area of 5 cm2. Determine the required mmf in order to produce a flux of 0.25 mWb in the air gap. Assume the magnetic ring has a relative permeability of 800.

Answer the following questions using formulas, figures, and diagrams.(a) What is coenergy in magnetic circuits?(b) How to calculate iron losses using BH curve in magnetic circuits?