Jove
Visualize
Contact Us

Related Concept Videos

Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

1.9K
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
1.9K
Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

2.8K
In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
2.8K
Divergence and Curl of Magnetic Field01:26

Divergence and Curl of Magnetic Field

4.5K
The magnetic field due to a volume current distribution given by the Biot–Savart Law can be expressed as follows:
4.5K
Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

921
Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
921
Boundary Conditions for Current Density01:25

Boundary Conditions for Current Density

1.4K
Current density becomes discontinuous across an interface of materials with different electrical conductivities. The normal component of the current density is continuous across the boundary.
1.4K
Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

5.5K
The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
5.5K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Laboratory study of avalanches in magnetized plasmas.

Physical review. E, Statistical, nonlinear, and soft matter physics·2015
See all related articles
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Video

Updated: Apr 22, 2026

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

2.5K

Kubo conductivity tensor for two- and three-dimensional magnetic nulls.

D A St-Onge1, R D Sydora1

  • 1Department of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|October 15, 2014
PubMed
Summary

Collisionless single-particle simulations reveal that stochastic frequency mixing significantly impacts conductivity in magnetic null systems. This leads to enhanced resistivity, particularly near the cyclotron frequency, affecting total energy dissipation.

More Related Videos

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
04:35

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment

Published on: July 5, 2024

2.2K
Ultrasound Velocity Measurement in a Liquid Metal Electrode
08:41

Ultrasound Velocity Measurement in a Liquid Metal Electrode

Published on: August 5, 2015

11.2K

Related Experiment Videos

Last Updated: Apr 22, 2026

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

2.5K
Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment
04:35

Author Spotlight: Simulation and Analysis of the Temperature Rise of Ring Main Unit Equipment

Published on: July 5, 2024

2.2K
Ultrasound Velocity Measurement in a Liquid Metal Electrode
08:41

Ultrasound Velocity Measurement in a Liquid Metal Electrode

Published on: August 5, 2015

11.2K

Area of Science:

  • Plasma Physics
  • Computational Physics
  • Astrophysics

Background:

  • Magnetic null systems are crucial in various astrophysical and laboratory plasmas.
  • Understanding charged particle dynamics in these systems is key to explaining energy transport and dissipation.
  • Previous studies have explored particle motion but lacked detailed conductivity calculations.

Purpose of the Study:

  • To compute the complete Kubo conductivity tensor in 2D and 3D linear magnetic null systems.
  • To investigate the role of chaotic charged-particle dynamics in determining conductivity.
  • To analyze the frequency dependence of conductivity and its implications for energy dissipation.

Main Methods:

  • Utilizing collisionless single-particle simulations to model charged particle behavior.
  • Constructing regions of chaotic charged-particle dynamics within magnetic null systems.
  • Calculating the Kubo conductivity tensor and analyzing its frequency spectrum.

Main Results:

  • Stochastic frequency mixing of particle bounce and gyromotion significantly contributes to conductivity.
  • Conductivity curves exhibit power-law behavior over specific frequency ranges.
  • AC conductivity is approximately one order of magnitude lower than DC conductivity, indicating enhanced resistivity.

Conclusions:

  • Chaotic dynamics and frequency mixing are critical factors in plasma conductivity within magnetic nulls.
  • Enhanced resistivity near the cyclotron frequency necessitates accounting for AC conductivity in dissipation calculations.
  • The findings provide a more accurate model for energy dissipation in magnetized plasmas.