Fundamental Metrology. The Magnetic-Field Theory of Measurements with Use of the Phenomenon of Transfer of Energy and Information through Material or Substance. Part I. Philosophical Aspects of the Theory

2018 ◽  
Vol 50 (2) ◽  
pp. 71-85
Author(s):  
Vladislav T. Kondratov
Keyword(s):  
Magnetic Field ◽  
Field Theory ◽  
Theory Of Measurements ◽  
The Magnetic Field

A Proof of the Biot-Savart Law

1968 ◽  
Vol 72 (689) ◽  
pp. 437
Author(s):  
B. G. Newman
Keyword(s):  
Magnetic Field ◽  
Field Theory ◽  
Electromagnetic Field ◽  
Fluid Mechanics ◽  
Small Length ◽  
Line Vortex ◽  
Line Current ◽  
Electromagnetic Field Theory ◽  
The Magnetic Field

The Biot-Savart law gives the velocity associated with an elemental portion of line vortex, or the magnetic field associated with an elemental portion of line current. The following proof may appeal to students who approach fluid mechanics or electromagnetic-field theory from the engineering viewpoint. It will be stated in terms of fluid mechanics. Consider a very small length δs of line vortex of circulation strength Γ. At P(x) the velocity δV associated with this portion depends on Γ δs and x.

scholarly journals ANOMALOUS DEFECTS AND THEIR QUANTIZED TRANSVERSE CONDUCTIVITIES

1998 ◽  
Vol 13 (05) ◽  
pp. 841-861 ◽  
Author(s):  
A. P. BALACHANDRAN ◽  
VARGHESE JOHN ◽  
ARSHAD MOMEN ◽  
FERNANDO MORAES
Keyword(s):  
Magnetic Field ◽  
Field Theory ◽  
Bound States ◽  
Three Dimensional ◽  
External Electromagnetic Field ◽  
Effective Field ◽  
Screw Dislocations ◽  
Dimensional Gravity ◽  
The Magnetic Field ◽  
Conduction Properties

Using a description of defects in solids in terms of three-dimensional gravity, we study the propagation of electrons in the background of disclinations and screw dislocations. We study the situations where there are bound states that are effectively localized on the defect and hence can be described in terms of an effective (1+1)-dimensional field theory for the low energy excitations. In the case of screw dislocations, we find that these excitations are chiral and can be described by an effective field theory of chiral fermions. Fermions of both chirality occur even for a given direction of the magnetic field. The "net" chirality of the system however is not always the same for a given direction of the magnetic field, but changes from one sign of the chirality through zero to the other sign as the Fermi momentum or the magnitude of the magnetic flux is varied. On coupling to an external electromagnetic field, the latter becomes anomalous and predicts novels conduction properties for these material.

The eigenvalues of electromagnetic angular momentum

1936 ◽  
Vol 32 (4) ◽  
pp. 614-621 ◽  
Author(s):  
M. H. L. Pryce
Keyword(s):  
Magnetic Field ◽  
Field Theory ◽  
Electromagnetic Field ◽  
Angular Momentum ◽  
Vector Potential ◽  
Charged Particles ◽  
Radial Component ◽  
Spin Angular Momentum ◽  
The Magnetic Field ◽  
Field Strengths

It is shown that the eigenvalues of the angular momentum of the electromagnetic field containing a number of charged particles, apart from spin angular momentum, are only the integral multiples of ħ. This is shown by using cylindrical polar variables, and taking a particular choice of the vector potential in which the radial component is zero, defined explicitly in terms of the magnetic field strengths. By expanding in terms of the Fourier functions einθ, the angular momentum is separated out into terms independent of one another, each taking on only integral values in units of ħ.The arguments all apply equally well to a modified field theory such as that of Born and Infeld.

THE MAGNETIC FIELD EXPLAINED, USING MCMAHON FIELD THEORY (2010)

2015 ◽  
Vol 8 (1) ◽  
pp. 2017-2026
Author(s):  
Casey McMahon
Keyword(s):  
Magnetic Field ◽  
Field Theory ◽  
Physical Explanation ◽  
The Magnetic Field

Here, I use the concepts of the McMahon field theory (2010) [1] to explain physically what the magnetic field is, how it arises, what it is made of and why we observe it. Other papers I have read explain the magnetic field as vectors only, in mathematical terms, not physical terms. Thus, I wanted a physical explanation of the magnetic field. This paper offers a physical explanation of what the magnetic field is, based on McMahon field theory (2010).

scholarly journals Newton &-vs Lorentz

2018 ◽  
Vol 14 (3) ◽  
pp. 5869-5872
Author(s):  
Armando Tomas Canero
Keyword(s):  
Magnetic Field ◽  
Field Theory ◽  
Classical Mechanics ◽  
Classical Field Theory ◽  
Classical Field ◽  
The Body ◽  
Circular Path ◽  
Third Law ◽  
A Minor ◽  
The Magnetic Field

Is there a point of divergence between Classical Mechanics and Electromagnetism? This discrepancy is raised by many authors and arises between Newton's third law and the equation of Lorentz forces. Due to the transcendence of these expressions, their wide application in different situations is not a minor issue and should be given a consistent interpretation with both theories. The discrepancy mentioned is based in that: according to the calculations of classical field theory, a particle with an electric charge moving immersed in a magnetic field suffers an action that diverts its trajectory, making it describe a circular path, which can not be compensated through a contrary force in the body that generated the magnetic field. The force on this second body is predicted, by this theory, at ninety degrees from the first, thus contradicting the principle of action and reaction. This study shows why the Lorentz law does not contradict Newton's third law and gives a consistent explanation of how the equations of classical field theory should be applied so that the result is correct.

Alignment as an Indicator of Changes to Modal Structure within the Roberts Flow

2017 ◽  
Vol 13 (S335) ◽  
pp. 26-28
Author(s):  
Daniel Miller
Keyword(s):  
Magnetic Field ◽  
Field Theory ◽  
Mean Field Theory ◽  
Mean Field ◽  
Velocity Fields ◽  
Dynamo Theory ◽  
Mhd Turbulence ◽  
Modal Structure ◽  
Kinematic Dynamo ◽  
The Magnetic Field

AbstractAlignment of the magnetic and velocity fields has previously been shown to play a role within nonlinear dynamo theory (Cameron and Galloway 2006), MHD turbulence (Matthaeus et al. 1980) and mean field theory (Yokoi 2013). What has not been previously examined is whether it is beneficial to examine alignment within kinematic dynamo theory. I show how measurements of alignment within kinematic dynamo theory for the Roberts flow can indicate a change in the structure of the magnetic field.

Observing the galactic magnetic field

1967 ◽  
Vol 31 ◽  
pp. 375-380
Author(s):  
H. C. van de Hulst
Keyword(s):  
Magnetic Field ◽  
Fair Agreement ◽  
Solar Neighbourhood ◽  
Galactic Magnetic Field ◽  
The Magnetic Field

Various methods of observing the galactic magnetic field are reviewed, and their results summarized. There is fair agreement about the direction of the magnetic field in the solar neighbourhood:l= 50° to 80°; the strength of the field in the disk is of the order of 10-5gauss.

Evolution of Large-Scale Coronal Structures

1994 ◽  
Vol 144 ◽  
pp. 29-33
Author(s):  
P. Ambrož
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Large Scale ◽  
Coronal Magnetic Field ◽  
Source Surface ◽  
Solar Cycles ◽  
Characteristic Relationship ◽  
The Magnetic Field ◽  
Coronal Structures

AbstractThe large-scale coronal structures observed during the sporadically visible solar eclipses were compared with the numerically extrapolated field-line structures of coronal magnetic field. A characteristic relationship between the observed structures of coronal plasma and the magnetic field line configurations was determined. The long-term evolution of large scale coronal structures inferred from photospheric magnetic observations in the course of 11- and 22-year solar cycles is described.Some known parameters, such as the source surface radius, or coronal rotation rate are discussed and actually interpreted. A relation between the large-scale photospheric magnetic field evolution and the coronal structure rearrangement is demonstrated.

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