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

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 Flux01:18

Magnetic Flux

5.4K
The magnetic flux measures the number of magnetic field lines passing through a given surface area. The SI unit for magnetic flux is the weber (Wb). Magnetic flux is a scalar quantity. It depends on three factors: the strength of the magnetic field B, the area through which the field lines pass, and the relative orientation of the field with the surface area.
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...
5.4K
Magnetic Force Between Two Parallel Currents01:13

Magnetic Force Between Two Parallel Currents

5.1K
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...
5.1K
Divergence and Curl of Magnetic Field01:26

Divergence and Curl of Magnetic Field

4.2K
The magnetic field due to a volume current distribution given by the Biot–Savart Law can be expressed as follows:
4.2K
Magnetic Field Lines01:19

Magnetic Field Lines

6.6K
The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the magnetic field lines forms a closed loop. The field lines emerge from the north pole (N), loop around to the south pole (S), and continue through the bar magnet back to the north pole.
Magnetic field lines follow several hard-and-fast rules:
6.6K
Magnetic Field due to Moving Charges01:23

Magnetic Field due to Moving Charges

12.6K
A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
12.6K

You might also read

Related Articles

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

Sort by
Same author

Flux-Rope Twist in Eruptive Flares and CMEs: Due to Zipper and Main-Phase Reconnection.

Solar physics·2020
Same author

Effect of heat treatment on microcrack healing behavior of a machinable dental ceramic.

Journal of biomedical materials research·1999
See all related articles

Related Experiment Video

Updated: Apr 14, 2026

Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy
09:01

Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy

Published on: May 22, 2020

3.7K

Relating magnetic reconnection to coronal heating.

D W Longcope1, L A Tarr2

  • 1Department of Physics, Montana State University, Bozeman, MT 59717, USA dana@solar.physics.montana.edu.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|April 22, 2015
PubMed
Summary
This summary is machine-generated.

Coronal magnetic reconnection is demonstrated to be a primary source of heat in the Sun's outer atmosphere. This process explains how the solar corona maintains its high temperatures through continuous magnetic field changes.

Keywords:
coronal heatingmagnetic reconnection

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

2.5K
Electric and Magnetic Field Devices for Stimulation of Biological Tissues
13:29

Electric and Magnetic Field Devices for Stimulation of Biological Tissues

Published on: May 15, 2021

5.9K

Related Experiment Videos

Last Updated: Apr 14, 2026

Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy
09:01

Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy

Published on: May 22, 2020

3.7K
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

2.5K
Electric and Magnetic Field Devices for Stimulation of Biological Tissues
13:29

Electric and Magnetic Field Devices for Stimulation of Biological Tissues

Published on: May 15, 2021

5.9K

Area of Science:

  • Solar Physics
  • Plasma Physics
  • Astrophysics

Background:

  • The solar corona is observed to be continuously heated, and coronal magnetic fields frequently undergo reconnection.
  • The precise mechanisms responsible for coronal heating remain a significant area of research.
  • It is not inherently understood how magnetic field line topological changes generate heat.

Purpose of the Study:

  • To investigate the relationship between coronal magnetic reconnection and coronal heating.
  • To quantify the heat generated by magnetic reconnection in the solar corona.
  • To determine if magnetic reconnection can account for the observed coronal temperatures.

Main Methods:

  • Analysis of a specific flux emergence event in the solar corona.
  • Measurement of the rate of coronal magnetic reconnection during the event.
  • Measurement of the rate of energy dissipation in the corona.
  • Calculation of the ratio between reconnection rate and energy dissipation rate.

Main Results:

  • A specific case of flux emergence provided measurements of coronal magnetic reconnection and energy dissipation rates.
  • The ratio of these rates was found to be comparable to the expected current at the boundary between emerged and pre-existing magnetic flux.
  • Generalizing this relationship to the entire corona (quiet Sun and active regions) provided estimates for coronal heating contributions from reconnection.

Conclusions:

  • Coronal magnetic reconnection is a significant contributor to the heating of the solar corona.
  • The estimated heating rates from magnetic reconnection are consistent with the energy required to maintain the corona at its observed temperature.
  • Magnetic reconnection provides a viable physical mechanism for solar coronal heating.