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Topic: Maxwell coil

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Magnetic coil

Magnetic field

Galileo Ferraris

Magnetic flux density

	YourArt.com >> Encyclopedia >> coil (Site not responding. Last check: 2007-11-05)
		A Oudin coil is a disruptive discharge coil.
		A chemistry coil is a tube of spiral form, used commonly to cool originating steam of the distillation and thus to condense them in liquid form.
		The RNA coil is a nucleic acid structure consisting of a string of covalently-bound nucleotides.
	www.yourart.com /research/encyclopedia.cgi?subject=/coil (915 words)

	Maxwell's Equations and four spaital dimensions
		The "vibrations" in a continuous non-quantized matter and energy field component of space responsible for generating a matterenergy wave on a "surface" of a three-dimensional space manifold with respect to a fourth spatial dimension are analogous to vibrations associated with a wave on the surface of water.
		This suggests the change in the magnetic environment of a coil, which causes a voltage to be "induced" in that coil, may be related to inertial properties of the "mass" component of the energy gradients associated with the unit electrical charge.
		This is because Chapter nine showed the energy gradients responsible for the generation of a magnetic flux in a coil are, in part, composed of a continuous non-quantized "mass" or matterfield component of space.
	home.comcast.net /~jeffocal/chapter24.htm (2560 words)

	Electrical Phenomena Research
		The coil was load with first a 470,000 ohm resistor and then a 100,000 ohm resistor the amplitude of the output signal went down a little indicating that power was being delivered to the resistors.
		Upon approaching the coil with the 600 ohm feed lead, the subject amplitude increased dramatically and was sustained.
		Another coil, with a length of 1000 ft. and a larger diameter, was tried and the same effect was noted, however, the ringing frequency was different.
	www.luminet.net /~wenonah/new/report.htm (1563 words)

	Newman's Theory: A Report
		The motor consisted of a large coil wound as a solenoid, with a large magnet rotating within the bore of the solenoid.
		Thus the voltage to the coil was pulsed.
		Coil length : 55 miles of copper wire Coil Inductance: 1,100 Henries measured by observing the current rise time when a D.C. voltage was applied.
	www.padrak.com /ine/NEWMAN3.html (2532 words)

	Maxwell coil - Wikipedia, the free encyclopedia
		A Maxwell coil is a device for producing a large volume of almost constant magnetic field.
		A Maxwell coil set consists of three coils in a slightly more complicated geometry than the Helmholtz configuration.
		The ampere-turns of the upper and lower coil should equal exactly 49/64ths of the middle coil.
	en.wikipedia.org /wiki/Maxwell_coil (106 words)

	Beginning of Radio
		It was James Clerk Maxwell, however, who built the theoretical bridge from electricity to radio.
		Maxwell presented his analysis in 1873, in the two volume books entitled "A Treatise on Electricity and Magnetism.
		A character is sent by passing a current through the corresponding coil, creating a magnetic field which turns the needle to indicate which character is being sent.
	www.sparkmuseum.com /BEGINS_RADIO.HTM (730 words)

	Ansoft Corporation - Maxwell 3D - Ansoft's Maxwell® v10 3D Transient with Large Motion Solver
		Additional equations are necessary to allow voltage-driven excitations for the coils and conductors in the application, separately for the case of solid conductors and for stranded windings.
		Maxwell is capable of creating automatically the cuts that will make the domain of the problem simply connected as shown in Fig.
		There are a few challenging aspects of the simulation that highlight many of Maxwell's key capabilities: Complex geometry of the device; Nonlinearity of the magnetic core; Motion-induced eddy currents in the solid steel claws (rotor); The rectifying electric circuit attached to the windings of the stator; and Core-loss computation in the steel of the stator.
	www.ansoft.com /products/em/max3d/transient_solver.cfm (1524 words)

	Outline - Induction - Physics 106
		Before we knew the cause of magnetism was a net flow of charge, we said a circular coil with current in counterclockwise direction as you view that end of the coil acted like a North pole.
		4b, the magnet moves toward the coil and the galvanometer deflects toward the left indicating an induced current and associated induced magnetic field (shown by dashed line) opposing the field of the magnet.
		When the North pole of the magnet with its field toward the left moved toward the right face of the coil, the induced current in the coil was counterclockwise as viewed from its right end with the Coil's induced field to the right.
	www.wellesley.edu /Physics/phyllisflemingphysics/106_o_induction.html (1017 words)

	Magnetic Resonance Technology IP - MRI Coils - Gradient Coils (Site not responding. Last check: 2007-11-05)
		The gradient coil configuration for the z-axis consists of e.g., Helmholtz pair coils, and of paired saddle coils for the x- and y-axis.
		A golay coil (a special kind of saddle coils) produces a linear gradient in the x and y axes that requires wires running along the bore of the magnet.
		Pairs of saddle coils (such as the Golay coils) are used as the x- and y-axis of gradient coils and as extremity coils.
	www.mr-tip.com /serv1.php?type=co&sub=14 (483 words)

	Learn Electronics Lessons and Information Pages
		Material that exists in the center of the mahnetic coil to either physically support the windings (non-magnetic material) or to concentrate the magnetic flux (magnetic material).
		A field effect transistor in which the insulating layer betwen the gate electrode and the channel is a metal oxide layer.
		Audio frequency current in the voice coil causes movement which is mechanically transferred to the speaker cone.
	www.twysted-pair.com /dictm.htm (810 words)

	PowerPedia:Magnetic field - PESWiki
		Maxwell did much to unify static electricity and magnetism, producing a set of four equations relating the two fields.
		Maxwell's equations - four equations describing the behavior of the electric and magnetic fields, and their interaction with matter.
		Maxwell coil - a device for producing a large volume of almost constant magnetic field.
	peswiki.com /index.php/Magnetic_field (3053 words)

	h1 EXPERIMENT ETA, h
		Maxwell was the first person to propose that what is waving in light is the electric and magnetic fields that make up the light beam.
		Maxwell’s work was partly based on the work of Michael Faraday who also thrived during the nineteenth century.
		One end of the coil wire is connected to one terminal of a current meter.
	www.unf.edu /~jgarner/labeta.html (993 words)

	Maxwell's Equations. From Einstein Light
		Maxwell's equations describe electricity, magnetism, space, time and the relationships among them.
		As we saw in the introductory film clip, their simplicity, symmetry and beauty persuaded Einsten to develop a theory of relativity in which Maxwell's equations were invariant.
		So, for the benefit of a lot of readers who still haven't tasted those pleasures, what I shall do next is to show the equations in their more elegant forms, giving an informal description of the notation.
	www.phys.unsw.edu.au /einsteinlight/jw/module3_Maxwell.htm (1353 words)

	Induced Voltage: Faraday's Law (Site not responding. Last check: 2007-11-05)
		The coil is wound on a core whose
		The coil is the secondary winding on a transformer where the primary current is changing.
		James Clerk Maxwell that the converse happens: that a changing E-field produces a magnetic field.
	www.ee.surrey.ac.uk /Workshop/advice/coils/faraday.html (1012 words)

	Hi-Temperature NMR Probe (Site not responding. Last check: 2007-11-05)
		The design of the levitator and rf coil were both set to high tolerances, in order to assure that the center of the levitated samples would be located in the center of the rf coil.
		The coil design is that of a Maxwell Pair (figure 4) placed outside of the rf saddle coil.
		As with all single-coil NMR circuits, when the rf coil is placed around the sample it becomes both a source of introduced rf radiation and a detector for the NMR signal generated by the precessing magnetization within the sample.
	physics-nmr.la.asu.edu /probes/hightemp/probe.html (1379 words)

	CAD case studies, CAD user stories
		We are using Maxwell to design actuators that can receive as much as 60 kilowatts of electrical power, and produce between 5,000 and 10,000 Newtons of thrust.
		Maxwell EMpulse was used to analyze behavior with the voice coil leads shorted.
		The analysis demonstrated that a large circulating current would be induced in the shorted voice coil giving rise to destructive forces in the coil assembly.
	www.johnstark.com /ca148.html (1740 words)

	Faraday's Law (Site not responding. Last check: 2007-11-05)
		The induced emf in a coil is equal to the negative of the rate of change of magnetic flux times the number of turns in the coil.
		When a magnet is moved into a coil of wire, changing the magnetic field and magnetic flux through the coil, a voltage will be generated in the coil according to Faraday's Law.
		In the example shown below, when the magnet is moved into the coil the galvanometer deflects to the left in response to the increasing field.
	hyperphysics.phy-astr.gsu.edu /hbase/electric/farlaw.html (366 words)

	Helmholtz coil - Wikipedia, the free encyclopedia
		The term Helmholtz coils refers to a device for producing a region of nearly uniform magnetic field.
		A Helmholtz pair consists of two identical circular magnetic coils that are placed symmetrically one on each side of the experimental area along a common axis, and separated by a distance equal to the radius of the coil.
		A cylindrical region extending between the centers of the two coils and approximately 1/5 of their diameter will have a nearly spatially uniform magnetic field.
	en.wikipedia.org /wiki/Helmholtz_coil (337 words)

	[No title] (Site not responding. Last check: 2007-11-05)
		He likes to point out that both Maxwell and Faraday, the pioneers of electromagnitism, believed that the fields consisted of matter in motion.
		Energy outputs consisted of incandescent bulbs in series with the batteries, flourescent tubes across the coil, and a fan powered by a belt attached to the shaft of the rotor.
		If the constant K in equation (2) is smaller than the constant K appearing in equation (1), then it may be varified that the efficiency can mathmatecally be larger than unity.
	www.textfiles.com /bbs/KEELYNET/ENERGY/newman5.asc (2458 words)

	The Electric Force - Electricity - Electrified Matter
		Maxwell's intutive sense for the natural order in the world, lead him to the idea that a changing electric field gives rise to an associated magnetic field.
		Faraday showed that the work per unit charge, called the electromotive force in a coil of wire was related to the time- rate of change of the magnetic flux enclosed by the coil.
		One of Maxwell's equations says that a changing magnetic field is associated with an electric field whose apparent rotation about a point is proportional to the time-rate of change of the magnetic field.
	www.luminet.net /~wenonah/new/electric.htm (1245 words)

	Electromagnetic Waves (Site not responding. Last check: 2007-11-05)
		Maxwell noticed a kind of symmetry between electric and magnetic fields.
		In Maxwell's theory, fields generate or propagate themselves.
		A changing electric field generates a changing magnetic field which generates a changing electric field, and so on.
	www.people.vcu.edu /~rgowdy/mod/098/imp.htm (106 words)

	Solutions to James Clerk Maxwell's Equations
		Caduceus Wound Coil Experiments -- "The caduceus coil illustrated in Fig.1, basically consists of ordinary insulated copper wire wound in a double-helix around a ferrite core.
		Maxwell and Dirac theories as an already unified theory (J. Vaz, Jr., W. Rodrigues, Jr.) -- In this paper we formulate Maxwell and Dirac theories as an already unified theory (in the sense of Misner and Wheeler).
		Tesla Coil Builder - This is a link to a very competent study of Tesla's technologies, especially in the direction of the radiative form of charge, and the aether, which I find very important and useful.
	www.rialian.com /rnboyd/maxwell.htm (929 words)

	Four Letters
		A moving observer would also observe complementary E and M fields if he (she) were to move a coil (fixed relative to the moving observer) over a stationary magnetic or move a magnet (fixed relative the moving observer) over a stationary coil.
		When relative motion comes into play, either by moving an iron core thru a coil, while passing current, or whether the observer is moving relative to a fixed field, the E-field will develop perpendicularly to the B-field in a manner consistent with the coordinate transformations of special relativity.
		Instead he opted to keep consistency in Maxwell's equations, and thus the Lorentz transformation was born and we ended up with dynamic, E and M fields.
	www.josephnewman.com /4_Ltrs._from_a_Math.html (1482 words)

	The Tom Bearden Website
		In the present classical Maxwell theory, both the unobserved components (the actual force-free precursors that act on the system to generate all its forces and dynamics) are assumed away arbitrarily.
		Maxwell’s original theory is 20 equations in 20 unknowns.
		The theory was later truncated by Maxwell himself on the insistence of his editor, and then particularly by Heaviside, Gibbs, and Hertz after Maxwell’s death.
	www.cheniere.org /references/maxwell.htm (3190 words)

	Electricity & Magnetism (Site not responding. Last check: 2007-11-05)
		As he was working on these equations, Maxwell realized that if one could produce a disembodied magnetic field in space and set it to oscillating like a wave, then it would produce an electric field.
		Although this did not prove that light was the mutually perpendicular electric and magnetic wave couplet which Maxwell envisioned, it was certainly suggestive, and Maxwell did suggest that light was an electromagnetic wave.
		Maxwell died of cancer when he was only 48, and it was left to others to extend his work.
	www.physics.northwestern.edu /Phyx103/web/EandM.html (2689 words)

	Physics Demonstrations - Electricity
		The Tesla coil is a type of resonant transformer that is capable of producing high frequency voltages of upwards of a million volts.
		The Tesla coil is essentially a radio transmitter without the antenna, and thus Tesla rightly deserves some of the credit for the invention of the radio, although his interest was more in the transmission of electric power than in communication.
		With a sufficiently large Van de Graaff generator or Tesla coil and an insulated platform for the cage to rest on, it is possible to raise the voltage of an ungrounded cage to a high level with a person inside.
	sprott.physics.wisc.edu /demobook/chapter4.htm (6297 words)

	Induction
		Whenever there is a change in the number of magnetic field lines passing through a loop of wire a voltage (or emf) is generated (or induced) in the loop of wire.
		Maxwell's Equations (section 29.7) will be covered later in Chapter 32 "Electromagnetic Waves."
		) through the coil increases and this results in an induced current in the opposite direction to the original current.
	www.physics.sjsu.edu /becker/physics51/induction.htm (619 words)

	VoltNet.com Tesla Zone
		It was using a new rotary gap and Maxwell pulse caps, but I had not added the larger toroids yet.
		The coil as of October '97, with larger toroids, Maxwell caps, and rotary gap.
		The streak at the bottom was caused by the electronic timer on the camera malfunctioning and catching me moving behind the coil with a flashlight after I had shut it off.
	www.electricmuseum.com /exhibits/tesla/coilarchive.shtml (686 words)

	Printer Friendly Version
		From Maxwell's equations, it is known that the B-field "curls" around the E-field, in the manner that a B-field curls around a current-carrying wire.
		When the tag coil is resonant, it couples strongly to the reader coil and changes the reader coil impedance.
		When there is 0 mm offset between the tag coil and the reader coil, the resonant tag coil couples strongly to the reader coil.
	www.mwrf.com /Articles/Print.cfm?ArticleID=5474 (2688 words)

	JOSEPH NEWMAN'S THEORY by Dr.Roger Hastings, PhD
		Gyroscopic massergies would become trapped in the wire and, as their number increased, so would the alignment of electrons and the number of gyroscopic massergies in the magnetic field increase.
		Coil Inductance: 1,100 Henries measured by observing the current rise time when a D.C. voltage was applied.
		The electro-mechanical coupling may be embedded in the Maxwell equations if a unified picture (such as Newman's picture of gyroscopic massergies) is adopted.
	www.josephnewman.com /JN_Theory_by_Hastings.html (2589 words)

	High Voltage Page: Tesla Coils, EM devices, explaoding wire, and more!
		Click here for a description of what a Tesla Coil is and how it works.
		This website also has over a hundred pictures of various Tesla Coils from the list members, including some coils that are nearly the largest in the world.
		This makes the arc go between the two coils, and I assume there isnt a need for a super good ground like a classic coil needs.
	members.tripod.com /~mad_coiler/tesla.htm (868 words)

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