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Magnetic Phase Transitions (Electricity and Magnetism)
Magnetic Phase Transitions (Electricity and Magnetism)

... Ferromagnets have a much higher magnetization than paramagnets. In addition, the phenomenon of ferromagnetism comes about due to a totally di erent mechanism. In ferromagnetic materials, the elementary magnets act in a cooperative fashion, forcing neighbouring magnets to align within themselves. Soo ...
magnetism solutions
magnetism solutions

... coffee pot, 950 W; and (iii) microwave, 675 W. If all were operated at the same time, what total current would they draw? 7A. (1) P = IV (2) I = P / V (3) I = 2950 W / 120 V (4) I = (2950 J/s) / (120 C/J) (5) I = 24.58 C/s = 24.6 A 8. How long does it take for 1.5 C to pass through a frictionless wi ...
Magnetic Resonance Imaging System Based on Earth`s Magnetic
Magnetic Resonance Imaging System Based on Earth`s Magnetic

... with gradient per unit current G/I ¼ 4.25  1024 T/A m. The inductance of the coil is 23.2 mH and the resistance is 0.31 V. The length of the linear gradient region is 11 cm. The NMR signal in a strong magnetic field is usually detected with low-inductance coils (small number of windings) because co ...
8J.1 About magnets (HSW)
8J.1 About magnets (HSW)

Lecture 17 - Multicore Computers 1
Lecture 17 - Multicore Computers 1

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ht tp: //qpa BASIC ELECTRICAL ENGINEERING

... CS/B.TECH(O)/SEM-1/EE-101/2012-13 iv) ...
The Ideal Transformer
The Ideal Transformer

... Thus, we find that for a step-up transformer, the primary resistance is much greater than that of the load resistance on the secondary. Conversely, a step-down transformer will exhibit a primary resistance R1 that is much smaller than that of the load. One more important note! We applied conservatio ...
induced current
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Magnetic Phase Transitions (Electricity and - Physlab
Magnetic Phase Transitions (Electricity and - Physlab

... has a higher resistance than than the other. Both are connected to identical voltage sources. Which of the elements will be heated more, the higher or the lower resistance element? Q 2. Suppose we have two heating elements made from the same material, nichrome, commonly used in domestic heaters? One ...
Chapter 11 - Inductors
Chapter 11 - Inductors

... When many turns of wire are used to construct a coil, the total resistance may be significant The inherent resistance is called the dc resistance or the winding resistance (RW) ...
EEE 302 Lecture 11 - Universitas Udayana
EEE 302 Lecture 11 - Universitas Udayana

S03 Editors Report - Raleigh
S03 Editors Report - Raleigh

... 1. Before you create a new account, please check for an existing account by clicking on: "Check for Existing Account" 2. Assuming that you do not get an existing account notification email, click on "Create New Account" and enter in your information. 3. Please specify any “Specialty / Area of Expert ...
Interaction of electric and magnetic fields with a human body
Interaction of electric and magnetic fields with a human body

... vicinity of wire (within a coil) under electricity Magnetic fields with low frequency - increase the excitability of brain, decrease the blood flow in vessels with a high diameter - aorta (this in turn, may decrease the blood pressure) Magnetic fields with high frequency- have mainly thermal effects ...
10.2 Electromagnets
10.2 Electromagnets

10.2 Electromagnets
10.2 Electromagnets

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1335260226.

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... • Mutual inductance (LM) determines the amount of voltage induced in the second coil based on the amount of current in the first coil. ...
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Electromagnetic Induction

Physics 2102 Spring 2002 Lecture 15
Physics 2102 Spring 2002 Lecture 15

Electrical Energy Saving with Improvement of Voltage and Current
Electrical Energy Saving with Improvement of Voltage and Current

... There is no doubt that low voltage and current quality is very common to all electrical installations around the world. This is happening due to: 1) Power electronics (inverter, dc converter, soft starter), for motors control and soft starting, which, however, «pollute» electrical installations with ...
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IEETESLA 36KB Oct 31 2000 09:41:54 PM - hot

Abbreviations, annotations and conventions used
Abbreviations, annotations and conventions used

Power Voltage Transformers
Power Voltage Transformers

Unit 9: Energy, electricity and magnetism
Unit 9: Energy, electricity and magnetism

... Generators transform transform different energy into electrical energy and produce currents. ● Batteries transform chemical reactions into electrical energy ● Alternators, like windmills and hydraulic turbines, transform mechanical energy into electrical. ● Solar panels transform luminous energy int ...
Unit 2 - CElliott
Unit 2 - CElliott

< 1 ... 63 64 65 66 67 68 69 70 71 ... 153 >

Magnetic core

A magnetic core is a piece of magnetic material with a high permeability used to confine and guide magnetic fields in electrical, electromechanical and magnetic devices such as electromagnets, transformers, electric motors, generators, inductors, magnetic recording heads, and magnetic assemblies. It is made of ferromagnetic metal such as iron, or ferrimagnetic compounds such as ferrites. The high permeability, relative to the surrounding air, causes the magnetic field lines to be concentrated in the core material. The magnetic field is often created by a coil of wire around the core that carries a current. The presence of the core can increase the magnetic field of a coil by a factor of several thousand over what it would be without the core.The use of a magnetic core can enormously concentrate the strength and increase the effect of magnetic fields produced by electric currents and permanent magnets. The properties of a device will depend crucially on the following factors: the geometry of the magnetic core. the amount of air gap in the magnetic circuit. the properties of the core material (especially permeability and hysteresis). the operating temperature of the core. whether the core is laminated to reduce eddy currents.In many applications it is undesirable for the core to retain magnetization when the applied field is removed. This property, called hysteresis can cause energy losses in applications such as transformers. Therefore, 'soft' magnetic materials with low hysteresis, such as silicon steel, rather than the 'hard' magnetic materials used for permanent magnets, are usually used in cores.
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