Jove
Visualize
Contact Us
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 Concept Videos

Magnetic Force Between Two Parallel Currents01:13

Magnetic Force Between Two Parallel Currents

3.6K
Two long, straight, and parallel current-carrying conductors exert a force of equal magnitude on one another. The direction of the force depends on the current direction in the conductors.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and  the vector product of the length vector along the current element and the field due to the first conductor. According to the...
3.6K
Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

1.1K
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...
1.1K
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

4.8K
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
4.8K
Magnetic Force On Current-Carrying Wires: Example01:22

Magnetic Force On Current-Carrying Wires: Example

1.5K
In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
1.5K
Magnetic Force On A Current-Carrying Conductor01:25

Magnetic Force On A Current-Carrying Conductor

4.2K
Moving charges experience a force in a magnetic field. Since the magnetic fields produced by moving charges are proportional to the current, a conductor carrying a current creates a magnetic field around it.
Consider a compass placed near a current-carrying wire. The wire experiences a force that aligns the needle of the compass tangentially around the wire. Thus, the current-carrying wire produces concentric circular loops of magnetic field. The magnetic field generated by a wire can be...
4.2K
Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

4.5K
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...
4.5K

You might also read

Related Articles

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

Sort by
Same author

Evidence for the Collective Nature of Radial Flow in Pb+Pb Collisions with the ATLAS Detector.

Physical review letters·2026
Same author

Evidence for the Dimuon Decay of the Higgs Boson in pp Collisions with the ATLAS Detector.

Physical review letters·2025
Same author

Evidence for Longitudinally Polarized W Bosons in the Electroweak Production of Same-Sign W Boson Pairs in Association with Two Jets in pp Collisions at sqrt[s]=13  TeV with the ATLAS Detector.

Physical review letters·2025
Same author

Observation of tt[over ¯] Production in Pb+Pb Collisions at sqrt[s_{NN}]=5.02  TeV with the ATLAS Detector.

Physical review letters·2025
Same author

Search for Dark Matter Produced in Association with a Dark Higgs Boson in the bb[over ¯] Final State Using pp Collisions at sqrt[s]=13  TeV with the ATLAS Detector.

Physical review letters·2025
Same author

Search for Magnetic Monopole Pair Production in Ultraperipheral Pb+Pb Collisions at sqrt[s_{NN}]=5.36  TeV with the ATLAS Detector at the LHC.

Physical review letters·2025

Related Experiment Video

Updated: Aug 20, 2025

Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

9.6K

Marginally stable current sheets in collisionless magnetic reconnection.

C Granier1,2, D Borgogno2, L Comisso3

  • 1Université Côte d'Azur, CNRS, Observatoire de la Côte d'Azur, Laboratoire J. L. Lagrange, Boulevard de l'Observatoire, CS 34229, 06304 Nice Cedex 4, France.

Physical Review. E
|November 18, 2022
PubMed
Summary

Collisionless current sheets can become unstable, forming plasmoids that enable fast magnetic reconnection. This study identifies conditions for plasmoid instability in purely collisionless, strong guide field reconnection, revealing a smaller aspect ratio requirement than in collisional regimes.

More Related Videos

Electrophysiological Recordings of Single-cell Ion Currents Under Well-defined Shear Stress
07:17

Electrophysiological Recordings of Single-cell Ion Currents Under Well-defined Shear Stress

Published on: August 2, 2019

6.3K
A 100 KW Class Applied-field Magnetoplasmadynamic Thruster
11:47

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster

Published on: December 22, 2018

9.2K

Related Experiment Videos

Last Updated: Aug 20, 2025

Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

9.6K
Electrophysiological Recordings of Single-cell Ion Currents Under Well-defined Shear Stress
07:17

Electrophysiological Recordings of Single-cell Ion Currents Under Well-defined Shear Stress

Published on: August 2, 2019

6.3K
A 100 KW Class Applied-field Magnetoplasmadynamic Thruster
11:47

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster

Published on: December 22, 2018

9.2K

Area of Science:

  • Plasma Physics
  • Astrophysics
  • Space Physics

Background:

  • Noncollisional current sheets, crucial for magnetic reconnection, are thin (electron skin depth).
  • These sheets can become unstable to plasmoid formation, enhancing reconnection rates.
  • Previous studies often considered collisional effects, but purely collisionless scenarios with guide fields are less understood.

Purpose of the Study:

  • To investigate the marginal stability conditions for plasmoid development in purely collisionless current sheets.
  • To analyze the role of a strong guide field in plasmoid formation.
  • To determine the geometric factors, including current sheet elongation, that promote plasmoid instability.

Main Methods:

  • Analysis of the geometry characterizing reconnecting current sheets.
  • Identification of regimes where the current sheet is plasmoid unstable.
  • Investigation of marginal stability conditions in a collisionless plasma with a strong guide field.

Main Results:

  • Plasmoids can form in collisionless current sheets with a significantly smaller aspect ratio than in collisional regimes.
  • The presence of a strong guide field influences the stability criteria for plasmoid formation.
  • Marginally stable current layers exhibit an inverse aspect ratio of approximately 0.1 in their plasma flow channels.

Conclusions:

  • Purely collisionless current sheets, even with strong guide fields, are susceptible to plasmoid instability.
  • The geometry of the current sheet, specifically its aspect ratio, is a critical factor for plasmoid formation.
  • These findings advance our understanding of fast magnetic reconnection mechanisms in various space and astrophysical plasmas.