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The flux-line lattice in superconductors
The flux-line lattice in superconductors

... broken zig-zag line shows the exotic field profile in clem superconductors at zero temperature (section 1.3). ...
The SQUID Handbook. Vol. 1, Fundamentals and Technology of
The SQUID Handbook. Vol. 1, Fundamentals and Technology of

... and textbooks devoted to broader aspects of superconductivity, and several proceedings of NATO Advanced Study Institutes (ASI) covering various aspects of superconducting electronics. In particular, the NATO proceedings,1) “SQUID Sensors: Fundamentals, Fabrication and Applications”, the most compreh ...
Spintronics: Fundamentals and applications
Spintronics: Fundamentals and applications

Investigations of the auroral luminosity distribution and the dynamics
Investigations of the auroral luminosity distribution and the dynamics

UNIVERSITAT POLITÈCNICA DE CATALUNYA Tesi Doctoral
UNIVERSITAT POLITÈCNICA DE CATALUNYA Tesi Doctoral

... For all the different physical polyhedrons presented, the evolution of the results is alike. As the discretization becomes finer, PeC-MFIE(RWG,unxRWG) and PeC-EFIECKWG,/?WG) yield the same result. The P&C-MFlE(unxRWG,RWG) operator, on the other hand, lets a solution that remains at a certain distanc ...
Lecture Notes 18: Relativistic Electrodynamics
Lecture Notes 18: Relativistic Electrodynamics

... * “Magnetism” is not “just” associated with the phenomenon of electromagnetism, but all four fundamental forces of nature: EM, strong, weak and gravity (and anything else!) – because space-time is the common “host” to all of the fundamental forces of nature – they all live / exist / co-exist in spac ...
Transport Properties of intense Ion Beam Pulse Propagation for High Energy Density Physics and Inertial Confinement Fusion Application
Transport Properties of intense Ion Beam Pulse Propagation for High Energy Density Physics and Inertial Confinement Fusion Application

... ion beams to a small spot size on the target. Typically, ion beam acceleration and transport in vacuum is provided by a periodic focusing accelerator. Then, a dense background plasma is used to neutralize the beam space-charge during the longitudinal compression process. Finally, additional transver ...
- ERA - University of Alberta
- ERA - University of Alberta

carl circuits - El Camino College
carl circuits - El Camino College

... ____ 44. There is a direct relationship between distance from the fulcrum and blurring. ____ 45. Objects above and below the fulcrum are projected directly on the fulcrum. ____ 46. There is an inverse relationship between the tomographic amplitude and the section thickness. ____ 47. The exposure amp ...
The Serrano`s Field Propulsion Thruster v1.0
The Serrano`s Field Propulsion Thruster v1.0

FEC–2012 Book of Abstracts pdfauthor=Paul Knowles <paul
FEC–2012 Book of Abstracts pdfauthor=Paul Knowles

Condensation and pattern formation in cold exciton gases in
Condensation and pattern formation in cold exciton gases in

Edmonton, Alberta
Edmonton, Alberta

Mr. SQUID User`s Guide - University of Toronto Physics
Mr. SQUID User`s Guide - University of Toronto Physics

Spin-Injection into GaAs using ferromagnetic (Ga,Mn)As contacts
Spin-Injection into GaAs using ferromagnetic (Ga,Mn)As contacts

... into the semiconductor. There is more than one possible solution to this problem, e.g. introducing low conductivity ferromagnets, this however renders traditional ferromagnets inapplicable. ...
A finite element analysis of critical state models for type
A finite element analysis of critical state models for type

... The Bean type critical state model requires the current density not to exceed some critical value, which is a difficult constraint to attain in 3D numerical analysis. To avoid this difficulty we employ a penalty method which approximates the non-smooth energy with a smooth energy so that the electri ...
NMR Spectroscopy
NMR Spectroscopy

... Even atomic mass & number: I = 0 (12C, 16O) Even atomic mass & odd number: I = whole integer (14N, 2H, 10B) Odd atomic mass: I = half integer (1H, 13C, 15N, 31P) ...
Mr. SQUID User`s Guide
Mr. SQUID User`s Guide

PLASMA PHYSICS AND FUSION ENERGY
PLASMA PHYSICS AND FUSION ENERGY

HSC Physics Past Paper Solutions
HSC Physics Past Paper Solutions

as a PDF
as a PDF

... 4.7.2 Coherent state is generated in resonant-like manner for light-like vacuum currents226 4.7.3 Stimulated topological condensation . . . . . . . . . . . . . . . . . . . . . . . . 226 ...
Plasma Oscillations and Operational Modes in Hall Effect Thrusters
Plasma Oscillations and Operational Modes in Hall Effect Thrusters

The Tutorial as PDF.
The Tutorial as PDF.

Simplified Equivalent Modelling of Electromagnetic Emissions from
Simplified Equivalent Modelling of Electromagnetic Emissions from

1 2 3 4 5 ... 388 >

Electromagnet



An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet.The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.Electromagnets are widely used as components of other electrical devices, such as motors, generators, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment. Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel.
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