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... In the recent past the problem of removing the deleterious iron particles from a process stream had a few alternatives. Magnetic separation was typically limited and moderately effective. Magnetic separators that used permanent magnets could generate fields of low intensity only. These worked well i ...
Calculation of the integral magnetic field of a star - ewald
Calculation of the integral magnetic field of a star - ewald

Real Magnetic Poles (Magnetic Charges)
Real Magnetic Poles (Magnetic Charges)

Chapter 6, "Instrumentation And Measurements,"
Chapter 6, "Instrumentation And Measurements,"

Lecture Notes 13: Steady Electric Currents, Magnetic Field, B
Lecture Notes 13: Steady Electric Currents, Magnetic Field, B

lab 5 Magnetic Fields and Forces
lab 5 Magnetic Fields and Forces

... Now make a single loop in the wire through which you can easily move the compass. Move the compass around the loop. In which direction is the compass pointing? How far away from the loop can you see a deflection? Is this distance larger along the axis of the loop or somewhere else? Set up your Hall ...
Assignment 15 Electricity and Water Analogy
Assignment 15 Electricity and Water Analogy

... When water flows from a small pipe to a large pipe, the flow (measured, for instance, in gallons per minute) is the same in both pipes, because the amount of water entering one pipe must equal the amount leaving the other. If not, water would accumulate in the pipes. For the same reason, the total e ...
lab 5 Magnetic Fields and Forces
lab 5 Magnetic Fields and Forces

... Now make a single loop in the wire through which you can easily move the compass. Move the compass around the loop. In which direction is the compass pointing? How far away from the loop can you see a deflection? Is this distance larger along the axis of the loop or somewhere else? Set up your Hall ...
chapter30.4 - Colorado Mesa University
chapter30.4 - Colorado Mesa University

... Where ...
Alfvén wings at Earth`s magnetosphere under strong interplanetary
Alfvén wings at Earth`s magnetosphere under strong interplanetary

Effects of Diffusion on Free Precession in Nuclear
Effects of Diffusion on Free Precession in Nuclear

... Nuclear resonance techniques involving free precession are examined, and, in particular, a convenient variation of Hahn s spin-echo method is described. This variation employs a combination of pulses of different intensity or duration ("90-degree" and "180-degree" pulses). Measurements of the transv ...
Estimation of Magnetic Torquing and Momentum
Estimation of Magnetic Torquing and Momentum

Electromagnetic Waves MCQs
Electromagnetic Waves MCQs

Conducting Sphere That Rotates in a Uniform Magnetic Field 1 Problem
Conducting Sphere That Rotates in a Uniform Magnetic Field 1 Problem

... separation occurs in a spinning object that is in zero external electric and magnetic fields.6 The difficulty in explaining planetary magnetism has led to the conjecture, particularly by P.M. Blackett in 1947,7 that spinning neutral objects can generate magnetic fields without the presence of internal c ...
Deflection of a stream of liquid metal by means of an alternating
Deflection of a stream of liquid metal by means of an alternating

... When coils carrying high-frequency currents are placed in the neighbourhood of a stream of liquid metal (or other electrically conducting fluid), the magnetic pressure on the liquid surface causes a deflection of the stream. This effect is studied for a twodimensional stream on the assumptions that ...
MICE Video Conferences and collaboration meetings - proj-muon
MICE Video Conferences and collaboration meetings - proj-muon

... ionization of muons are collected on the far side of the chamber with respect to the cooling section, so as to ensure a minimum of material between the emittance measurement and the cooling channel. The charges are amplified by GEM foils, and read-out on a plane of pads from which the signal is shap ...
Unit 4 Telephones (fixed
Unit 4 Telephones (fixed

No Slide Title
No Slide Title

... This is the work done on the sample Strictly speaking, we can only say it is a heat dissipation if we integrate round a loop and come back to the same place - otherwise the energy just might be stored Around a loop the red 'crossover' sections are complicated, but we usually approximate them as stra ...
Lab 1 - Flux Linkage and Inductance
Lab 1 - Flux Linkage and Inductance

The solar wind
The solar wind

... On typical field lines, attached to the Earth at both ends, such motion would soon lead the particles into the atmosphere, where they would collide and lose their energy. However, an additional feature of trapped motion usually prevents this from happening: the sliding motion slows down as the parti ...
Barium cloud experiments in the upper atmosphere
Barium cloud experiments in the upper atmosphere

Chapter 19: Magnetic Forces and Fields
Chapter 19: Magnetic Forces and Fields

... Fisica Generale - Alan Giambattista, Betty McCarty Richardson ...
Giessler/Crookes Tube and Cathode Ray
Giessler/Crookes Tube and Cathode Ray

Physics 30 - Structured Independent Learning
Physics 30 - Structured Independent Learning

Physics 30 - Structured Independent Learning
Physics 30 - Structured Independent Learning

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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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