Image Magnetic declination.svg thumb Example of magneticdeclination showing a compass needle with a positive or easterly variation from geographic north. Magneticdeclination is the angle between magnetic ... to prevent possible ambiguity. Also called magneticdeclination. http www.irbs.com bowditch pdf glossary gloss uvwxyz.pdf Change of declination in time and space Magneticdeclination varies both from ... changes to the field strength and direction at the same point on the Earth. The magneticdeclination ... the declination Image World MagneticDeclination 2010.pdf thumb 350px Level curves drawn on a declination map to denote the magneticdeclination, described by signed degrees. Each level curve is an isogonic ... thumb 100px Change of magneticdeclination in Israel map Statement for 2010 In a diagram ... would indicate the same as the 10 W just discussed. Declination converts between true and magnetic bearings True Bearing equals Magnetic Bearing plus MagneticDeclination. See http www.ngdc.noaa.gov ... the declination can be determined as the difference between the magnetic bearing and a visual bearing ... citation url http earthsci.org education fieldsk declin.htm title Magneticdeclination, what it is , how to compensate. ref Learning the declination for an area File Mv world.jpg thumb 300px NIMA Magnetic ... of the current magneticdeclination for a given location based on a worldwide empirical model of the deep ... east of the agonic line zero declination , roughly east of the Mississippi The magnetic bearing ... of the Earth s magnetic field MC magnetic course what the course would be in the absence of local declination .... Air navigation Image Earth Magnetic Field Declination from 1590 to 1990.gif right Estimated declination contours by year, 1590 to 1990 Magneticdeclination has a very important influence on air navigation ... hg.jpg thumb Declination needle div col Portal inline Nautical Geomagnetism L shell Magnetic ... app for magneticdeclination at the NGDC http geomag.nrcan.gc.ca apps mdcal eng.php Magneticdeclination ... more details
other uses File Ra and dec demo animation small.gif right thumb 350px Right ascension and declination ... of the ecliptic red on the celestial equator blue . Declination is measured in degrees north or south ... those south have negative declinations. An object on the celestial equator has a declination of 0 . An object at the celestial north pole has a declination of 90 . An object at the celestial south pole has a declination of &minus 90 . The sign is customarily included even if it is positive. Any unit of angle can be used for declination, but it is often expressed in minute of arc degrees, minutes ..., and are therefore called circumpolar star s. An extreme example is the pole star which has a declination ... close to the equator. At the horizon, declination is always 0 due east and west. Due north, it is 90 ..., only at the poles is declination uniform along a 360 degree sweep of the horizon. The Sun s declination ..., which is called midnight sun . When an object is directly overhead its declination is almost .... The first complication applies to all celestial objects the object s declination equals ... system objects declination is ordinarily measured at the center of the earth, which isn t quite ... s surface. It turns out that when the moon is directly overhead its geocentric declination can differ ... Earth , with its declination roughly constant from year to year, but right ascension and declination ... 1 cellpadding 5 Declination of stars visible in the Northern Hemisphere by observer s latitude scope ... s of the year. Declination of the Sun as seen from Earth This section is linked from Horizontal coordinate system The declination of the Sun , sub unicode sub , is the angle between the rays ... 23 26 . Because this axial tilt is nearly constant, solar declination sub unicode sub varies ... equator , and sub unicode sub is 0 . The Sun s declination at any given moment is calculated ... number of days after the December solstice to January 1. This equation overestimates the declination ... more details
Wiktionarypar declinationDeclination can refer to Declination , coordinate used in astronomy The noun form of the verb Decline Magneticdeclination , angle that must be added or subtracted in the use of compass for geography Grid declination , angle between the compass north and north direction of the map coordinate grid Clinamen , a concept in early atomic theory See also Declension , use of case in linguistics Decline Disambig als Deklination ast Declinaci n ca Declinaci da Deklination de Deklination es Declinaci n eo Deklinacio fr D clinaison gl Declinaci n hr Deklinacija he la Declinatio lv Deklin cija mk nl Declinatie ja nds Deklinatschoon ru sk Deklin cia rozli ovacia str nka sr fi Deklinaatio sv Deklination ... more details
unreferenced date April 2012 notability music date April 2012 Infobox single See Wikipedia WikiProject Albums Name It s Magnetic Type Single music Single Artist Assembly Now Cover Itsmagnetic cover.jpg Released August 28, 2006 Recorded 2006 Genre Indie rock Length 7 18 Label Kids Producer John Fortis, Howard Gray Reviews Assembly Now remould South London indie pap into epic, passionate pop on their debut. The four piece sound more like The Cure than The Libertines, the jagged guitar edges cutting shapes around a ragged, ranted vocal... They look set to soar straight into the hearts of anyone who can recognise a good tune. That s you, that is. The Fly magazine The Fly It s Magnetic is the first single by British rock band Assembly Now. It was released on August 28, 2006 on Independent record labels independent label Kids. It is a limited edition single, having been pressed on 7 transparent Gramaphone record vinyl with a run of only 1000 copies. Track listing It s Magnetic 3 24 Out On 24s 3 54 Miscellanea Luke Smith, ex guitarist from acclaimed British post punk band Clor , remixed It s Magnetic which was distributed free via music blog s and on the band s http www.assemblynow.com official website . Category 2006 singles ... more details
magnetization on the compass. Magnetic deviation is the error induced in a compass by local magnetic field s, which must be allowed for, along with magneticdeclination , if accurate bearings are to be calculated ..., the compass reading must be corrected for two effects. The first is magneticdeclination , the angular difference between magnetic North the local direction of the Earth s magnetic field and true North. The second is magnetic deviation , the angular difference between magnetic North and the compass needle due to nearby sources of iron. Magnetic anomalies The Earth s magnetic field is modified by local magnetic anomalies . These include variations of the magnetization in the Crust geology ...about compass error due to local magnetic fields variation of the Earth s magnetic field from true North Declination citations missing date February 2010 Image CompassAdjusting013.JPG thumb right Slots ..., these are indicated on maps as part of the declination. Because the Earth s field Geomagnetic ... , particularly during geomagnetic storms . Internal sources In navigation manuals, magnetic deviation ... that is induced by the Earth s magnetic field. Because the latter depends on the orientation of the craft ... soft iron spheres are placed on side arms. However, because the magnetic signature of every ..., periodically, to keep the deviation errors to a practical minimum. ref harvnb NGIA ref Magnetic ... s certificate of competency. The sources of magnetic deviation vary from compass to compass or vehicle ... to accommodate them. Non magnetic methods of taking bearings, such as with gyrocompass , Astronomy ... to magnetic deviation. Thus, a comparison of bearings taken with such methods with the bearing given by a compass can be used to compute local magnetic deviation. History Image PSM V34 D323 ... measuring the magnetic deviation as the ship was oriented in several compass directions. These measurements ... cite web url http myreckonings.com wordpress 2009 04 18 magnetic deviation comprehension ... more details
Magnetic memory may refer to Magnetic storage , the storage of data on a magnetized medium Remanence , or residual magnetization, the magnetization left behind in a ferromagnet after an external magnetic field is removed Rock magnetism , the study of the magnetic properties of rocks, sediments and soils disambig ... more details
Magnetic induction may refer to one of the following Electromagnetic induction Magnetic field B is sometimes called magnetic induction disambig hr magnetska indukcija ... more details
Magnetic trap refers to one of three types of traps used for atoms or charged particles Magnetic trap atoms , used to trap neutral atoms in a magnetic field gradient Penning trap , used to trap charged particles or ions in a combination of electrostatic potential and uniform magnetic field Magneto optical trap or MOT , a trap using a magnetic gradient and laser light to trap neutral atoms Magnetic tweezers , a trap using a magnetic field to trap micrometre seized ferromagnetic beads disambig ... more details
Magnetic resonance abbreviated MR can mean Nuclear magnetic resonance Electron spin resonance Magnetic resonance imaging MRI Functional magnetic resonance imaging fMRI Muon spin spectroscopy SR disambig he sk Magnetick rezonancia uk zh ... more details
MagneticCircuitSegments Magnetic inductance is not to be confused with Magnetic induction , which usually refers to Magnetic field . Magnetic inductance inductive magnetic reactance SI Unit Omega sup 1 sup is a component in the gyrator capacitor model for magnetic systems. For phasor analysis the magnetic inductive reactance is math x L omega L M math Where math L M math is the magnetic inductivity SI Unit s Omega sup 1 sup math omega math is the angular frequency of the magnetic circuit In the complex form it is a positive imaginary number math jx L j omega L M math The magnetic potential energy sustained by magnetic inductivity varies with the frequency of oscillations in electric fields. The average power in a given period is equal to zero. Due to its dependence on frequency, magnetic inductance is mainly observable in magnetic circuits which operate at Very high frequency VHF and or Ultra high frequency UHF frequencies. The notion of magnetic inductivity is employed in analysis and computation of circuit behavior in the gyrator capacitor model in a way analogous to inductance in electrical circuits. See also Magnetic inductive coil References Pohl R. W. ELEKTRIZIT TSLEHRE. Berlin G ttingen Heidelberg SPRINGER VERLAG, 1960. Popov V. P. The Principles of Theory of Circuits. M. Higher School, 1985, 496 p. In Russian . Category Magnetic circuits electromagnetism stub ar ... more details
Orphan date February 2009 Image MagDev Apply.jpg thumb right Applying Magnetic Developer to a magnetic stripe Image MagDev EncodingDamaged.jpg thumb right An example of damaged magnetic encoding. A magnet was run across this stripe. The encoding has been made visible by applying a Magnetic Developer solution Magnetic developer is a fluid which makes the magnetism magnetic information written on magnetic tape or the magnetic stripe of a credit card or ATM card visible to the naked eye. Magnetic developer can be found in liquid or aerosol form. When applied to a magnetic stripe, suspended metal particles will be attracted to the magnetically charged regions of the stripe as the liquid evaporates. Magnetic developer can be used to troubleshoot problems with magnetic stripes and the equipment that encodes and reads them. By making the encoding visible, one can see how encoding head alignment affects the position of the data tracks, and observe any possible magnetic damage that has occurred on the magnetic stripe. External links http www.genevainc.com Products Professional Prod Professional Prod professional prod 5.html Geneva Group dead link date March 2012 web site http www.sprague magnetics.com audio.htm magdev Sprague Magnetics web site http www.q card.com info developer.asp Q Card web site http www.cardserv.com.au catalog kyread.php Kyread from CardServ dead link date March 2012 web site Category Magnetic devices tech stub ... more details
Magnetic fluid may refer to Magnetorheological fluid , a fluid that changes viscosity when subjected to a magnetic field. Ferrofluid , a strongly Paramagnetism paramagnetic fluid. disambig ... more details
In geophysics , a magnetic anomaly is a local variation in the Earth s magnetic field resulting from variations in the chemistry or magnetism of the rocks. Mapping of variation over an area is valuable in detecting structures obscured by overlying material. The magnetic variation in successive bands of ocean floor parallel with mid ocean ridge s is important evidence supporting the theory of seafloor spreading , central to plate tectonics . These layers are used for dating rocks. In fiction Monolith Space Odyssey Tycho Magnetic Anomaly 1 See also Aeromagnetic survey Earth s magnetic field Kursk Magnetic Anomaly Magnetometer Temagami Magnetic Anomaly DEFAULTSORT Magnetic Anomaly Category Geomagnetism geophysics stub pl Anomalia magnetyczna ru vi D th ng t uk ... more details
Magnetic energy and electric energy are related by Maxwell s equations . The potential energy of a magnet of magnetic moment m in a magnetic field B is defined as the mechanical work work of magnetic force actually of magnetic torque on re alignment of the vector of the magnetic dipole moment, and is equal math E rm p,m m cdot B math while the energy stored in an inductor of inductance L when current I is passing via it is math E rm p,m 1 over 2 LI 2 math . This second expression forms the basis for superconducting magnetic energy storage . External links http farside.ph.utexas.edu teaching em lectures node84.html Magnetic Energy , Richard Fitzpatrick Professor of Physics The University of Texas at Austin. Footer energy Category Forms of energy it Energia magnetica ... more details
Orphan date July 2008 att July 2008 Magnetic midnight is the time of day when an observer on earth s surface, the North Magnetic Pole North or South Magnetic Pole , and the sun are in alignment. This is best time for observing Aurora astronomy auroras . ref name EncSciTech http books.google.com books?id BIVUAAAAMAAJ&q 22Magnetic midnight 22 2Bdefinition&dq 22Magnetic midnight 22 2Bdefinition&pgis 1 McGraw Hill Encyclopedia of Science & Technology . Online August 7, 2008. ref Because Earth s Poles of astronomical bodies Magnetic poles magnetic poles do not coincide with its geographical pole geographical poles the angle between Earth s axis of rotation rotation axis and Earth magnetic field Main characteristics magnetic axis is about 11 magnetic midnight differs from conventional midnight . In most of the U.S., magnetic midnight occurs about an hour earlier. ref name eaae http www.eaae astronomy.org WG3 SS WorkShops Auroras.html ref References references DEFAULTSORT Magnetic Midnight Category Night sun stub geo term stub measure stub ... more details
Wiktionary Magnetic pole may refer to One of the two ends of a magnet The poles of astronomical bodies Magnetic poles magnetic poles of astronomical bodies , a special case of magnets, such as The North Magnetic Pole of planet Earth, a point where the north end of a compass points downward The South Magnetic Pole of planet Earth, a point where the south end of a compass points downward See also Geomagnetic Pole , determined by a statistical fit to measurements of the Earth s magnetic field Earth s magnetic field disambig de Magnetischer Pol eo Magneta poluso nl Magnetische pool ru ... more details
MagneticCircuitSegments Magnetic capacitance capacitive magnetic reactance SI Unit Omega sup 1 sup is a magnetic reactance which prevents magnetic current in oscillating magnetic circuits from rising. This is associated with high reluctance. For harmonic regimes it is equal to math x C frac 1 omega C M math Where math C M math is the magnetic capacitivity SI Unit s Omega sup 1 sup math omega math is the angular frequency of the magnetic circuit In complex form it is written as an imaginary number math jx C j frac 1 omega C M frac 1 j omega C M math The electrical potential energy sustained by Magnetic capacitivity varies with the frequency of oscillations in magnetic fields. The average power in a given period is equal to zero. The magnetic capacitivity is a reactive part of the magnetic circuit 1, 2 . ref Pohl R. W. ELEKTRIZIT TSLEHRE. Berlin Gottingen Heidelberg SPRINGER VERLAG, 1960. ref ref Popov V. P. The Principles of Theory of Circuits. M. Higher School, 1985, 496 p. In Russian . ref References references Category Magnetic circuits ... more details
MagneticCircuitSegments Magnetic impedance SI Unit Omega sup 1 sup is the ratio of a sinusoidal magnetic tension math N m math to a sinusoidal magnetic current math I Mm math in a gyrator capacitor model . Analogous to electrical impedance , magnetic impedance is likewise a complex variable. math z M frac N I M frac N m I Mm math Magnetic impedance is also called the full magnetic resistance. It is derived from math r M z M cos phi math , the magnetic effective resistance effective magnetic resistance real math x M z M sin phi math , the magnetic reactive resistance reactive magnetic resistance imaginary The phase angle math phi math of the magnetic impedance is equal to math phi arctan frac x M r M math References Pohl R. W. ELEKTRIZIT TSLEHRE. Berlin Gottingen Heidelberg SPRINGER VERLAG, 1960. Popov V. P. The Principles of Theory of Circuits. M. Higher School, 1985, 496 p. In Russian . Karl K pfm ller K pfm ller K . Einf hrung in die theoretische Elektrotechnik, Springer Verlag, 1959. Category Magnetic circuits ... more details
MagneticCircuitSegments Magnetic capacitivity SI Unit Henry unit H is a component used in the gyrator capacitor model of magnetic systems. This element, denoted as math C M math , is an extensive property and is defined as math C M mu r mu 0 frac S l math Where math mu r mu 0 mu math is the Permeability electromagnetism magnetic permeability , math S math is the element cross section, and math l math is the element length. For phasor analysis, the magnetic permeability 1 and the magnetic capacitivity are complex values 1, 2 . Magnetic capacitivity is also equal to magnetic flux divided by the difference of magnetic potential across the element. math C M frac Phi phi M1 phi M2 math Where math phi M1 phi M2 math is the difference of the magnetic potential s. The notion of magnetic capacitivity is employed in the gyrator capacitor model in a way analogous to capacitance in electrical circuits. References Refbegin Arkadiew W. Eine Theorie des elektromagnetischen Feldes in den ferromagnetischen Metallen . Phys. Zs., H. 14, No 19, 1913, S. 928 934. Popov V. P. The Principles of Theory of Circuits . M. Higher School, 1985, 496 p. In Russian . Refend Category Magnetic circuits physics stub ... more details
A magnetic impurity is an impurity in a host metal that has a magnetic moment . The magnetic impurity can then interact with the conduction electrons of the metal, leading to interesting physics such as the Kondo effect , and heavy fermion behaviour. Some examples of magnetic impurities that metals can be doped with are iron and nickel . Such an impurity will contribute a Curie Weiss term to the magnetic susceptibility , math chi imp frac C T theta math . Early theoretical work concentrated on explaining the trend observed as the impurity was varied across the transition metal group. Based on the idea of a virtual bound state , P. W. Anderson Anderson proposed a model that was successful in explaining the formation of a localized magnetic moment from a magnetic impurity. See also Anderson impurity model Anderson orthogonality theorem Magnetic semiconductors References P.W. Anderson, Phys. Rev. 124 1961 , p. 41 condensedmatter stub Category Condensed matter physics es Impureza magn tica ... more details
Multiple issues orphan February 2009 unreferenced January 2008 A magnetic alloy is a combination of various metals from the periodic table that contains at least one of the three main magnetic elements iron iron Fe , nickel nickel Ni , and cobalt cobalt Co . Such an alloy must contain but is not limited to one or more of these metals. Magnetic alloys have become common, especially in the form of steel iron and carbon, alnico iron, nickel, cobalt, and aluminum , and permalloy iron and nickel. The strongest magnetic element is iron, which allows items made out of these alloys to attract to magnets. See also Ferroalloy DEFAULTSORT Magnetic Alloy Category Magnetic alloys alloy stub el ... more details
Unreferenced stub auto yes date December 2009 Magnetic pressure is an energy density associated with the magnetic field . It is identical to any other physical pressure except that it is carried by the magnetic field rather than in the case of gas kinetic energy of the gas molecules. Interplay between magnetic pressure and ordinary gas pressure is important to both the fields of magnetohydrodynamics and plasma physics . Any magnetic field has an associated pressure that is contained by the boundary conditions on the field, and a gradient in field strength causes a force due to the magnetic pressure gradient this force is called the magnetic pressure force . The magnetic pressure force is most readily observed in an unsupported loop of wire if an electric current passes through the loop, then the wire serves as an electromagnet , so that the magnetic field strength inside the loop is much greater than the field strength just outside the loop. The gradient in field strength gives rise to a magnetic ... through the wire, then the loop of wire will form a circle . At even higher currents, the magnetic ... or even explosively fragment. Management of magnetic pressure is a significant challenge in the design of ultrastrong electromagnets. Magnetic pressure can be used to propel projectiles this is the operating principle of a railgun . If any currents present are parallel to the field, the magnetic field lines follow shapes in which the magnetic pressure gradient is exactly balanced by the magnetic tension force . Such a field configuration is called force free magnetic field force free , because there is no Lorentz force math j times B 0 math . The familiar potential magnetic field ... current at all. The magnetic pressure math P B math is given in International System of Units ... dyn cm , B in Gauss unit G by math P B frac B 2 8 pi math . See also Magnetic tension force DEFAULTSORT Magnetic Pressure Category Plasma physics Physics stub de Magnetischer Druck fr Pression ... more details
Magnetic separation is a process in which magnetically susceptible material is extracted from a mixture using a magnetic force. This separation technique can be useful in mining iron as it is attracted to a magnet. In mines where wolframite was mixed with cassiterite , such as South Crofty and East Pool mine in Cornwall or with bismuth such as at the Shepherd and Murphy mine in Moina, Tasmania , magnetic separation was used to separate the ores. At these mines a device called a Wetherill s Magnetic Separator invented by John Price Wetherill, 1844 1906 ref cite web url http explorepahistory.com hmarker.php?markerId 1040 title Historical Markers Samuel Wetherill publisher ExplorePAhistory.com accessdate 2009 08 03 ref was used. In this machine the raw ore, after calcination was fed onto a moving belt which passed underneath two pairs of electromagnet s under which further belts ran at right angles to the feed belt. The first pair of electromagnets was weakly magnetised and served to draw off any iron ore present. The second pair were strongly magnetised and attracted the wolframite, which is weakly magnetic. These machines were capable of treating 10 tons of ore a day. It is also used in electromagnetic cranes that separates magnetic material from scraps. ref cite book last Earl first Bryan title Cornish Mining The Techniques of Metal Mining in the West of England, Past and Present publisher Cornish Hillside Publications location St Austell edition 2nd page 97 date 1994 isbn 0 9519419 3 3 ref See also High intensity magnetic separator References Reflist low intensity magnetic separator External links http www.cogelme.com eng e magnetic separator overbelt overband.htm More information and videos about magnetic separator in Cogelme site http www.cogelme.com eng e magnetic separator.htm Magnetic separator overbelt overband on Cogelme site Category Industrial processes Category Separation processes Category Magnetic devices Category Magnetism Physics stub el ... more details
MagneticCircuitSegments A magnetic circuit is made up of one or more closed loop paths containing a magnetic ... by magnetic core s consisting of ferromagnetic materials like iron, although there may be air gaps or other materials in the path. Magnetic circuits are employed to efficiently channel magnetic ... s, lifting electromagnet s, SQUID s, galvanometer s, and magnetic recording head s. The concept of a magnetic circuit exploits a one to one correspondence between the equations of the magnetic field in an Magnetic saturation unsaturated ferromagnetic material to that of an electrical circuit . Using this concept the magnetic fields of complex devices such as transformer s can be quickly solved using the methods and techniques developed for electrical circuits. Some examples of magnetic circuits ... charge in electrical circuits, magnetomotive force MMF drives magnetic flux through magnetic ... magnetic monopole magnetic charge would gain by completing the loop. The magnetic flux that is driven is not a current of magnetic charge it merely has the same relationship to MMF that electric ... number of the inducting coil. Magnetic flux Main magnetic flux An applied MMF drives magnetic flux through the magnetic components of the system. The magnetic flux through a magnetic component is proportional to the number of Magnetic field Magnetic field lines magnetic field lines that pass through ... in one direction, minus the number passing through in the other direction. The direction of the magnetic ... to the direction of magnetic field is given by the product of the magnetic field and the area element. More generally, magnetic flux is defined by a scalar product of the magnetic field and the area element vector. Quantitatively, the magnetic flux through a surface S is defined as the integral of the magnetic field over the area of the surface math Phi m int int S mathbf B cdot d mathbf S. math For a magnetic component the area S used to calculate the magnetic flux is usually chosen to be the cross ... more details
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