scholarly journals Sensitivity of Planaria to Weak, Patterned Electric Current and the Subsequent Correlative Interactions with Fluctuations in the Intensity of the Magnetic Field of Earth

J ◽  
2020 ◽  
Vol 3 (1) ◽  
pp. 79-89
Author(s):  
Victoria Hossack ◽  
Michael Persinger ◽  
Blake Dotta
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Electric Current ◽  
Electromagnetic Fields ◽  
Linear Correlation ◽  
Small Proportion ◽  
Weak Electric Field ◽  
Electric And Magnetic Fields ◽  
The Magnetic Field ◽  
Highly Evolved

Some species of fish show highly evolved mechanisms by which they can detect exogenous electric and magnetic fields. The detection of electromagnetic fields has been hypothesized to exist in humans, despite the lack of specialized sensors. In this experiment, planaria were tested in a t-maze with weak electric current pulsed in one arm to determine if the planaria showed any indication of being able to detect it. It was found that a small proportion of the population seemed to be attracted to this current. Additionally, if the experiment was preceded by a geomagnetic storm, the planaria showed a linear correlation increase in the variability of their movement in response to the presence of the weak electric field. Both of these results indicate that a subpopulation of planaria show some ability to respond to electromagnetic fields.

Suppression of runaway of electrons in a Lorentz plasma. II. crossed electric and magnetic fields

1970 ◽  
Vol 4 (3) ◽  
pp. 441-450 ◽  
Author(s):  
Barbara Abraham-Shrauner
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Electric Field ◽  
Electric Fields ◽  
Cyclotron Frequency ◽  
Collision Frequency ◽  
Uniform Electric Field ◽  
Drift Motion ◽  
Electric And Magnetic Fields ◽  
The Magnetic Field

Suppression of runaway of electrons in a weak, uniform electric field in a fully ionized Lorentz plasma by crossed magnetic and electric fields is analysed. A uniform, constant magnetic field parallel to a constant or harmonically time varying electric field does not alter runaway from that in the absence of the magnetic field. For crossed, constant fields the passage to runaway or to free motion as described by constant drift motion and spiral motion about the magnetic field is lengthened in time for strong magnetic fields. The new ‘runaway’ time scale is roughly the ratio of the cyclotron frequency to the collision frequency squared for cyclotron frequencies much greater than the collision frequency. All ‘runaway’ time scales may be given approximately by t2E Teff where tE is the characteristic time of the electric field and Teff is the ffective collision time as estimated from the appropriate component of the electrical conductivity.

scholarly journals ELECTROMAGNETIC-GRAVITATIONAL CONVERSION CROSS-SECTIONS IN EXTERNAL ELECTROMAGNETIC FIELDS

1994 ◽  
Vol 09 (39) ◽  
pp. 3619-3627 ◽  
Author(s):  
HOANG NGOC LONG ◽  
DANG VAN SOA ◽  
TUAN A. TRAN
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Electromagnetic Fields ◽  
Cross Sections ◽  
Differential Cross ◽  
Numerical Evaluation ◽  
Differential Cross Sections ◽  
Perturbation Techniques ◽  
External Electromagnetic Fields ◽  
The Magnetic Field

The classical processes: the conversion of photons into gravitons in the static electromagnetic fields are considered by using Feynman perturbation techniques. The differential cross-sections are presented for the conversion in the electric field of the flat condenser and the magnetic field of the solenoid. A numerical evaluation shows that the cross-sections may have the observable value in the present technical scenario.

scholarly journals On Reactive Force in Thin Unclosed Conductor and Displacement Current

2021 ◽  
Vol 3 (5) ◽  
pp. 7-10
Author(s):  
Sergey A. Gerasimov
Keyword(s):  
Magnetic Field ◽  
Electric Current ◽  
Electromagnetic Fields ◽  
Momentum Density ◽  
Linear Momentum ◽  
The Self ◽  
Displacement Current ◽  
Reactive Force ◽  
Self Force ◽  
The Magnetic Field

The linear momentum density carried by electromagnetic fields creates the hidden force acting on the displacement current between ends of an unclosed conductor with alternative electric current. This force compensates the self-force exerted by the unclosed conductor with zero thin. The magnetic field produced by displacement current does not contribute to the force acting on the conductor. The unclosed conductor can move under action of the self-force. At small heights of cylindrical open conductor, the reactive force equivalent to the self-force becomes very large

scholarly journals Effect of combined electric and magnetic fields on the helium spectrum

1929 ◽  
Vol 122 (790) ◽  
pp. 599-603 ◽  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Electric Field ◽  
Classical Theory ◽  
Stark Effect ◽  
Classical View ◽  
Electric And Magnetic Fields ◽  
Perpendicular Component ◽  
The Individual ◽  
The Magnetic Field

This paper deals with the observed effect of simultaneous electric and magnetic fields on certain of the more intense helium lines, and is further limited to the case where the fields are uniform and parallel. The effect of parallel fields was first considered by Garbasso, who adopted the classical view of the “rough” Stark-effect on H β as given by Voigt, and concluded that the effects due to the two fields should be simply superimposed. Shortly after this he was able to make visual observations which were restricted to H α owing to intensity requirements. A source of the Lo Surdo type was placed along the axis of the hollow poles of a Weiss magnet, and the analysis made with a Michelson echelon. In the electric field alone Garbasso observed two parallel components and one undisplaced perpendicular component. This corresponds to a so-called “rough” analysis of the Stark-effect in which the individual components are not observed. In the magnetic field he found a normal Zeeman pattern. With combined parallel fields there appeared two parallel components in the position of the Stark components of like polarisation, and two symmetrically placed perpendicular components with the normal Zeeman separation. This simple result could not be given a satisfactory interpretation on classical theory.

Horizontal Magnetic Dipole Embedded in a Two-Layer Conducting Medium

1972 ◽  
Vol 50 (6) ◽  
pp. 607-616 ◽  
Author(s):  
V. Ramaswamy ◽  
H. W. Dosso ◽  
J. T. Weaver
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Electric Field ◽  
Magnetic Dipole ◽  
Low Frequency ◽  
Bottom Layer ◽  
Conducting Medium ◽  
Dimensionless Form ◽  
Electric And Magnetic Fields ◽  
The Magnetic Field

The solutions for low-frequency fields of a horizontal magnetic dipole embedded within a two-layer conductor are derived. For convenience, the solutions are expressed in dimensionless form. The amplitudes and phases of the electric and magnetic fields along the surface of the bottom layer are calculated numerically and their dependence on the ratio of the conductivities of the two layers is investigated. Results indicate that, in general, the electric field induced by a subsurface horizontal magnetic dipole is more sensitive to the bottom-layer conductivity than is the magnetic field. Some of the results discussed in this paper are of interest in studying the seabed conductivity.

Modelling of the Computer Classroom Electromagnetic Field

1970 ◽  
Vol 109 (3) ◽  
pp. 75-80 ◽  
Author(s):  
P. Baltrenas ◽  
R. Buckus ◽  
S. Vasarevicius
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Field ◽  
Magnetic Flux ◽  
Electric Field ◽  
Electromagnetic Fields ◽  
Magnetic Flux Density ◽  
Computer Classroom ◽  
Electric And Magnetic Fields ◽  
Long Time ◽  
Video And Audio

Operation of office, video and audio equipment generates electromagnetic fields. Many employees who use computers for a long time complain of headaches and other health troubles. This has become a serious problem as electromagnetic fields are invisible and intangible and an employee, therefore, is unaware of how to protect oneself from them. This work involves modelling of the strengths of computer-generated electric and magnetic fields in the frequency ranges 5 Hz - 2 kHz and 2 kHz - 400 kHz in a computer classroom. After measuring the initial parameters of an electric and a magnetic field, electromagnetic fields propagating in the classroom were modelled with the help of the software VIZIMAG. Propagation and directions of electromagnetic field isolines are also presented. The modelling software VIZIMAG allows us to identify the strength of electric field or the frequency of magnetic field as well as the area of a room where they are present. Separate models are designed for both electric strength and magnetic flux density. Ill. 9, bibl. 11, tabl. 1 (in English; abstracts in English and Lithuanian).http://dx.doi.org/10.5755/j01.eee.109.3.175

On the Dielectrophoretic and Magnetic Alignment of Magnetoactive Barium Hexaferrite-PDMS Nanocomposites

2017 ◽  
Author(s):  
Md Abdulla Al Masud ◽  
Noel D’Souza ◽  
Paris von Lockette ◽  
Zoubeida Ounaies
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Magnetic Fields ◽  
Electric Field ◽  
Barium Hexaferrite ◽  
Magnetic Alignment ◽  
Hydrothermal Temperature ◽  
Duration Magnitude ◽  
Electric And Magnetic Fields ◽  
The Magnetic Field

In this study, we demonstrate the electric and magnetic manipulation of nanoscale M-type Barium Hexaferrite (nBF) in polydimethylsiloxane (PDMS) to engineer a multifunctional nanocomposite with improved dielectric and magnetic properties. First, we synthesized the single crystal nBF via the hydrothermal synthesis route. The hydrothermal temperature, duration, and surfactant conditions were optimized to improve the magnetic properties of the nBFs, with further improvement achieved by post-annealing. The annealed nBFs were aligned dielectrophoretically (DEP) in the polymer matrices by applying an AC electric field. Under the influence of this electric field, nBFs were observed to rotate, align and form chains within the polymer matrix. Optical microscopy (OM) imaging was used to determine the electrical alignment conditions (duration, magnitude, and frequency) and these parameters were used to fabricate the composites. A Teflon setup with Indium Tin Oxide (ITO) coated Polyethylene Terephthalate (PET) was used, where the ITO coatings act as electrodes for the electric field-manipulation. To simultaneously apply the magnetic field, this Teflon setup is placed between two permanent magnets capable of generating a 0.6 T external magnetic field. Along with electric and magnetic fields, concurrent heating was applied to cure the PDMS and freeze the microstructure formed due to electric and magnetic fields. Upon completion of the curing step, parallel chain formation is observed under OM. The X-Ray Diffraction (XRD) results also confirm that the particles are magnetically oriented in the direction of the magnetic field within the chain. Vibrating Sample Magnetometry (VSM) measurements and dielectric spectroscopy are used to characterize the extent of anisotropy and improvement in dielectric and magnetic properties compared to random composites. We find that simultaneous electric and magnetic field alignment improves the dielectric properties by 12% compared to just magnetic alignment. We also observe 19% improved squareness ratio when both fields are applied. The possibility of simultaneous electrical and magnetic alignment of magnetic nanoparticles will open up new doors to manipulate and design particle-modified polymers for various applications.

scholarly journals Understanding Electromagnetics from the Perspective of Mechanics

2021 ◽  
Author(s):  
Wei Fan
Keyword(s):  
Magnetic Field ◽  
Energy Level ◽  
Electric Field ◽  
Electric Current ◽  
Flow Resistance ◽  
Electron Momentum ◽  
Electron Orbital ◽  
Basic Concepts ◽  
Potential Pressure ◽  
The Magnetic Field

Abstract This article attempts to provide a feasible understanding of electromagnetics from the perspective of mechanics. Among them, from the perspective of mechanics, charge can be understood as a form of electron momentum; electric current can be understood as a momentum flow; resistance can be understood as a momentum resistance of electrons; voltage can be interpreted as the potential pressure or energy level difference of the electron orbital potential; the electric field can be understood as a manifestation of the magnetic field of the current element. Finally, this article proposes a new understanding of some basic concepts of electromagnetics from the perspective of mechanics.

scholarly journals Chiral magnetic effect in the presence of electroweak interactions as a quasiclassical phenomenon

2018 ◽  
Vol 33 (07n08) ◽  
pp. 1850043 ◽  
Author(s):  
Maxim Dvornikov ◽  
Victor B. Semikoz
Keyword(s):  
Magnetic Field ◽  
Particle Acceleration ◽  
External Magnetic Field ◽  
Energy Density ◽  
Electric Field ◽  
Electromagnetic Fields ◽  
Magnetic Effect ◽  
Chiral Magnetic Effect ◽  
Electric And Magnetic Fields ◽  
Quantum Approach

We elaborate the quasiclassical approach to obtain the modified chiral magnetic effect (CME) in the case when the massless charged fermions interact with electromagnetic fields and the background matter by the electroweak forces. The derivation of the anomalous current along the external magnetic field involves the study of the energy density evolution of chiral particles in parallel electric and magnetic fields. We consider both the particle acceleration by the external electric field and the contribution of the Adler anomaly. The condition of the validity of this method for the derivation of the CME is formulated. We obtain the expression for the electric current along the external magnetic field, which appears to coincide with our previous results based on the purely quantum approach. Our results are compared with the findings of other authors.

Positron Annihilation Rate Variation in the Presence of Electric and Magnetic Fields

1975 ◽  
Vol 53 (2) ◽  
pp. 133-139 ◽  
Author(s):  
M. P. Srivastava ◽  
P. S. Grover
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Electric Field ◽  
Positron Annihilation ◽  
Applied Magnetic Field ◽  
Noble Gases ◽  
Rate Variation ◽  
Annihilation Rate ◽  
Electric And Magnetic Fields ◽  
The Magnetic Field

The variation of the positron annihilation rate λa in noble gases He, Ne, and Ar has been studied in the presence of an external applied magnetic field, when the electric field is kept constant. It is found that λa increases as the magnetic field is increased. In the case of Ar, the dependence is quite appreciable whereas in He and Ne it is comparatively smaller.

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