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MRI - Princeton Radiology
MRI - Princeton Radiology

Collins AQA A-level Physics Year 2 Student Book Answers Student
Collins AQA A-level Physics Year 2 Student Book Answers Student

Theoretical Analysis on Crystal Alignment of Feeble Magnetic
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... aligning crystals in materials. It is well known that the high magnetic field can align crystals having magnetic anisotropy. However, effects of Brownian motion of crystals in liquid medium and gravity force on the crystal alignment are not well known. In this study, it has been found that there is a ...
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Magnetic field turbulence, electron heating, magnetic holes, proton

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... Insulators can exhibit a new state, different from known mechanical, thermal or electrification states, identified by the fact that such objects are acted upon by supplementary forces and torques when placed in an external electric field, even if they are not electrified and carry no electric conduc ...
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... probability for being found directly behind the sphere but classical electrons have zero probability. (5) Quantum and classical results differ strongly when small quantum numbers are involved. For the processes discussed below, none of these situations seems to occur. Since some of the processes are ...
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... As shown in Figure 12.9(b), current in a circular loop or coil of wire produces a magnetic field like that of a bar magnet. An electromagnet uses a current-carrying coil of wire to generate a magnetic field that is easy to switch on and off. The strength of an electromagnet can be influenced by: • i ...
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User Manual v2.1 Copyright © 2011 - 2014 Nicholas F. Chilton

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SOME PROPERTIES OF SHOCK WAVES PRODUCED IN AIR BY

... the development of the gas-dynamical phenomena. We here present the results of our study of shock wave formation in air during the initial stage of wire explosion. We differentiated clearly the phases of linear wire expansion, stratification, first and second shock waves, and breakdown, and determin ...
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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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