scholarly journals Computation of per-unit-length internal impedance of a multilayer cylindrical conductor with possible dielectric layers

2020 ◽  
Vol 33 (4) ◽  
pp. 605-616
Author(s):  
Dino Lovric ◽  
Slavko Vujevic ◽  
Ivan Krolo
Keyword(s):  
Magnetic Field ◽  
Maxwell Equations ◽  
Bessel Functions ◽  
Unit Length ◽  
Dielectric Layers ◽  
Electric And Magnetic Fields ◽  
Electric And Magnetic Field ◽  
Internal Impedance ◽  
Novel Method ◽  
Displacement Currents

In this manuscript, a novel method for computation of per-unit-length internal impedance of a cylindrical multilayer conductor with conductive and dielectric layers is presented in detail. In addition to this, formulas for computation of electric and magnetic field distribution throughout the entire multilayer conductor (including dielectric layers) have been derived. The presented formulas for electric and magnetic field in conductive layers have been directly derived from Maxwell equations using modified Bessel functions. However, electric and magnetic field in dielectric layers has been computed indirectly from the electric and magnetic fields in contiguous conductive layers which reduces the total number of unknowns in the system of equations. Displacement currents have been disregarded in both conductive and dielectric layers. This is justifiable if the conductive layers are good conductors. The validity of introducing these approximations is tested in the paper versus a model that takes into account displacement currents in all types of layers.

scholarly journals Charged Particle Trajectories in Static Electric and Magnetic Fields

1961 ◽  
Vol 14 (2) ◽  
pp. 310
Author(s):  
KJ Ausburn
Keyword(s):  
Magnetic Field ◽  
Charged Particle ◽  
Magnetic Fields ◽  
Analytical Solution ◽  
Arc Length ◽  
Intrinsic Interest ◽  
Field Distributions ◽  
Electric And Magnetic Fields ◽  
Electric And Magnetic Field ◽  
Curvature And Torsion

A trajectory passing through a given point in a given direction is completely determined if its curvature and torsion are known functions of its arc length. Relativistic expressions for the curvature and torsion in terms of the electric and magnetic field distributions are derived below. Besides their intrinsic interest these expressions may be useful in the analytical solution of some simple trajectory problems.

scholarly journals Nature of Energy Interactions

2020 ◽  
Vol 5 (6) ◽  
pp. 1461-1470
Author(s):  
Cynelle Olívia de Souza
Keyword(s):  
Magnetic Field ◽  
Kinetic Energy ◽  
Thermal Energy ◽  
Electromagnetic Waves ◽  
Second Harmonic ◽  
Intimate Relationship ◽  
Subatomic Particles ◽  
Electric And Magnetic Fields ◽  
Electric And Magnetic Field ◽  
Intrinsic Kinetic

Electromagnetic waves have an electric and magnetic field. There is an intimate relationship between these two fields and in this present work we adopt the theory that subatomic particles, here being considered neutrinos, can carry the thermal energy calculated through intrinsic kinetic energy. The field of neutrinos determined here may be responsible for the formation of the second harmonic, recently discovered, in which highly energetic electromagnetic waves, in the order of terahertz, excite superconducting electrons. Theories related to the electron and the electric and magnetic fields were also addressed, as their nature is fundamental to the understanding of electromagnetic waves, the interaction between them and the broad effects on nature.

scholarly journals On the numerical computation of cylindrical conductor internal impedance for complex arguments of large magnitude

2017 ◽  
Vol 30 (1) ◽  
pp. 81-91 ◽  
Author(s):  
Slavko Vujevic ◽  
Dino Lovric
Keyword(s):  
Numerical Computation ◽  
Numerical Algorithm ◽  
Bessel Functions ◽  
Unit Length ◽  
Exact Formula ◽  
Asymptotic Approximations ◽  
Modified Bessel Functions ◽  
Large Magnitude ◽  
Internal Impedance ◽  
Cylindrical Conductors

In this paper a numerical algorithm for computation of per-unit-length internal impedance of cylindrical conductors under complex arguments of large magnitude is presented. The presented algorithm either numerically solves the scaled exact formula for internal impedance or employs asymptotic approximations of modified Bessel functions when applicable. The formulas presented can be used for computation of per-unit-length internal impedance of solid cylindrical conductors as well as tubular cylindrical conductors.

scholarly journals Penetration of the electric and magnetic field components of Schumann resonances into the ionosphere

2005 ◽  
Vol 23 (7) ◽  
pp. 2559-2564 ◽  
Author(s):  
V. Grimalsky ◽  
S. Koshevaya ◽  
A. Kotsarenko ◽  
R. Perez Enriquez
Keyword(s):  
Magnetic Field ◽  
Wave Propagation ◽  
Geomagnetic Field ◽  
Guided Waves ◽  
Schumann Resonance ◽  
Schumann Resonances ◽  
Magnetic Components ◽  
Electric And Magnetic Fields ◽  
Electric And Magnetic Field ◽  
The Magnetic Field

Abstract. A penetration of electric and magnetic fields of the first global electromagnetic ELF resonance into the ionosphere in the cavity Earth-ionosphere is investigated numerically. It is shown that a penetration height for magnetic components is 2–3 times greater than for electric components and it depends essentially on the value of the geomagnetic field and its orientation with respect to the normal to the Earth's surface. A penetration height for the electric field is about 50÷70 km, and for the magnetic field it is 120÷240 km. An influence of variations of the conductivity of the ionosphere at the daytime and nighttime and under different solar activity on a penetration of the fields of the first Schumann resonance has been investigated. Keywords. Electromagnetics (Guided waves) – Ionosphere (Ionosphere-atmosphere interactions; Wave propagation)

scholarly journals <i>Brief communication</i> "Modeling tornado dynamics and the generation of infrasound, electric and magnetic fields"

2010 ◽  
Vol 10 (2) ◽  
pp. 295-298 ◽  
Author(s):  
E. D. Schmitter
Keyword(s):  
Magnetic Field ◽  
Velocity Field ◽  
Magnetic Fields ◽  
Early Warning ◽  
Time Varying ◽  
Dust Devils ◽  
Model Calculations ◽  
Electric And Magnetic Fields ◽  
Electric And Magnetic Field ◽  
Insight Into

Abstract. Recent observations endorse earlier measurements of time varying electric and magnetic fields generated by tornadoes and dust devils. These signals may provide a means for early warning but together with a proper modeling approach can also provide insight into geometry and dynamics of the vortices. Our model calculations show the existence of pressure resonances characterized as acoustic duct modes with well defined frequencies. These resonances not only generate infrasound but also modulate the charge density and the velocity field and in this way lead to electric and magnetic field oscillations in the 0.5–20-Hz range that can be monitored from a distance of several kilometers.

Electric and magnetic field induced dimensionality reduction in InGaAs-GaAs superlattices

1992 ◽  
Vol 70 (10-11) ◽  
pp. 819-823 ◽  
Author(s):  
Alain Roth ◽  
Emmanuel Lugagne-Delpon ◽  
Paul Voisin
Keyword(s):  
Magnetic Field ◽  
Binding Energy ◽  
Magnetic Fields ◽  
Dimensionality Reduction ◽  
Oscillator Strength ◽  
Electric And Magnetic Fields ◽  
Electric And Magnetic Field ◽  
Exciton Interactions

We have measured photoconductivity spectra in a InGaAs/GaAs superlattice subjected to longitudinal electric and magnetic fields. We have observed a clear sharpening of the excitonic features in the spectra as the fields increases. Furthermore, the intensity of excitons involving spatially separated electrons and holes increases with increasing magnetic field relative to that of vertical excitons. These observations can be interpreted with a model that lakes into account exciton wavefunction shrinkage induced by magnetic field. Oblique excitons have a smaller binding energy than vertical excitons and are therefore more sensitive to magnetic localization, which enhances their oscillator strength relative to that of vertical excitons. Strong exciton interactions are also observed, giving rise to level anticrossings.

scholarly journals On the existence of the field line solutions of the Einstein–Maxwell equations

2018 ◽  
Vol 15 (04) ◽  
pp. 1850054 ◽  
Author(s):  
Ion V. Vancea
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Maxwell Equations ◽  
Hyperbolic Manifold ◽  
Flat Space ◽  
Einstein Equations ◽  
Maxwell Theory ◽  
Real Representation ◽  
Electric And Magnetic Field ◽  
Field Lines

The main result of this paper is the proof that there are local electric and magnetic field configurations expressed in terms of field lines on an arbitrary hyperbolic manifold. This electromagnetic field is described by (dual) solutions of the Maxwell’s equations of the Einstein–Maxwell theory. These solutions have the following important properties: (i) they are general, in the sense that the knot solutions are particular cases of them and (ii) they reduce to the electromagnetic fields in the field line representation in the flat space-time. Also, we discuss briefly the real representation of these electromagnetic configurations and write down the corresponding Einstein equations.

scholarly journals Electric and Magnetic Field Effects in p-Methoxy Benzylidene p′-n-Butylaniline

1976 ◽  
Vol 31 (3-4) ◽  
pp. 283-287 ◽  
Author(s):  
N. V. S. Rao ◽  
P. R. Kishore ◽  
T. F. S. Raj ◽  
M. N. Avadhanlu ◽  
C. R. K. Murty
Keyword(s):  
Magnetic Field ◽  
Dielectric Constant ◽  
Liquid Crystal ◽  
Magnetic Fields ◽  
Nematic Liquid Crystal ◽  
Nematic Phase ◽  
Relative Effectiveness ◽  
Magnetic Field Effects ◽  
Electric And Magnetic Fields ◽  
Electric And Magnetic Field

Molecular alignment in the nematic phase of p-methoxy benzylidene p′-n-butylaniline (MBBA) in the presence of electric and magnetic fields is investigated. The relative effectiveness of electric and magentic fields on the nematic liquid crystal MBBA is discussed. In the dielectric regime it is found that the threshold fields for chevron formation are considerably different from the threshold fields for inducing changes in the dielectric constant.

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