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8.02x - Module 10.01 - Pressure Due to a Magnetic Field in a Solenoid.
8.02x - Module 10.01 - Pressure Due to a Magnetic Field in a Solenoid.
Published: 2015/02/16
Channel: Lectures by Walter Lewin. They will make you ♥ Physics.
Vortex induced negative magnetic pressure
Vortex induced negative magnetic pressure
Published: 2016/07/21
Channel: Vinny Real
Liquid metal pool deformation by means of magnetic pressure
Liquid metal pool deformation by means of magnetic pressure
Published: 2016/08/12
Channel: mohamad taha Mirhoseini
Magnetic Fields Interaction With Aluminum
Magnetic Fields Interaction With Aluminum
Published: 2015/12/02
Channel: MrfixitRick
Sun simulator hides solar eclipse with pl@netaty magnetic pressure creates cloud punch 12/13/2016
Sun simulator hides solar eclipse with pl@netaty magnetic pressure creates cloud punch 12/13/2016
Published: 2017/01/24
Channel: Jeff P
WSO - Skies are JUST NOT RIGHT - Plus, Magnetic Pressure from Dark Side Continues
WSO - Skies are JUST NOT RIGHT - Plus, Magnetic Pressure from Dark Side Continues
Published: 2017/07/05
Channel: WSO
Centripetal Spin and Magnetic Current in relation to Water Pressure
Centripetal Spin and Magnetic Current in relation to Water Pressure
Published: 2010/11/06
Channel: TheRealVerbz
Magnetic Tesla Turbine Generator
Magnetic Tesla Turbine Generator
Published: 2012/10/26
Channel: MrfixitRick
WSO - Does Magnetic Pressure Indicate 2nd Star in our Solar System?
WSO - Does Magnetic Pressure Indicate 2nd Star in our Solar System?
Published: 2017/07/02
Channel: WSO
Does Magnetic Pressure Indicate 2nd Star in our Solar System
Does Magnetic Pressure Indicate 2nd Star in our Solar System
Published: 2017/11/06
Channel: TRi Dan
UFO Alien Leak FS32 - Magnetic Air Car (in progress)
UFO Alien Leak FS32 - Magnetic Air Car (in progress)
Published: 2013/12/21
Channel: immediateur
Magnetic Push to Release Double Cabinet Door Catch   LocksOnline Product Reviews
Magnetic Push to Release Double Cabinet Door Catch LocksOnline Product Reviews
Published: 2015/02/05
Channel: LocksOnline
The Real fact ,why BERMUDA TRIANGLE has great magnetic pressure🌎🌏
The Real fact ,why BERMUDA TRIANGLE has great magnetic pressure🌎🌏
Published: 2017/08/03
Channel: Kangana
Magnetic Acupressure Clip and Studs
Magnetic Acupressure Clip and Studs
Published: 2013/09/09
Channel: Magnetic Experience
【Nuevo Anunci】ZOYO Magnetic Clay Plasticine Toy Pressure Reduction Toy de Tmart.es
【Nuevo Anunci】ZOYO Magnetic Clay Plasticine Toy Pressure Reduction Toy de Tmart.es
Published: 2014/12/22
Channel: Tmart España
Centripetal Spin and Magnetic Current in Relation to Water Pressure
Centripetal Spin and Magnetic Current in Relation to Water Pressure
Published: 2011/06/08
Channel: TheRealVerbz2
Lecture 15 - Magnetohydrodynamics, beta, magnetic pressure, sausage instabilities, kink instability
Lecture 15 - Magnetohydrodynamics, beta, magnetic pressure, sausage instabilities, kink instability
Published: 2017/05/30
Channel: USYD - Senior Plasma Physics Lectures
Ratio of gas to magnetic pressure in a star partially disrupted by a supermassive black hole
Ratio of gas to magnetic pressure in a star partially disrupted by a supermassive black hole
Published: 2016/09/27
Channel: James Guillochon
Magnetic pressure
Magnetic pressure
Published: 2016/09/25
Channel: SchoolBoy Stuu
Air, electrical & magnetic pressure sound waves
Air, electrical & magnetic pressure sound waves
Published: 2014/08/20
Channel: Project studio handbook
ot magnetic pressure
ot magnetic pressure
Published: 2016/01/28
Channel: Gareth Murphy
magnetic pressure
magnetic pressure
Published: 2011/01/08
Channel: TheCapricornBros
Space Weather: Magnetic Field Pressure
Space Weather: Magnetic Field Pressure
Published: 2016/12/23
Channel: SolarAlchemy
Magnetic Pressure
Magnetic Pressure
Published: 2017/02/25
Channel: Denis Underground - Topic
Magnetic Pressure
Magnetic Pressure
Published: 2014/11/07
Channel: Various Artists - Topic
WSO - Skies are JUST NOT RIGHT - Plus, Magnetic Pressure from Dark Side Continues
WSO - Skies are JUST NOT RIGHT - Plus, Magnetic Pressure from Dark Side Continues
Published: 2017/11/03
Channel: Thurta Succe
Magnetic Pressure
Magnetic Pressure
Published: 2017/02/25
Channel: Denis Underground - Topic
Magnetosphere 2011 05 28 - High pressure, temporary loss of magnetic Southpole
Magnetosphere 2011 05 28 - High pressure, temporary loss of magnetic Southpole
Published: 2011/05/29
Channel: TunnelVision
电和磁 49 Pressure Due to a Magnetic Field in
电和磁 49 Pressure Due to a Magnetic Field in
Published: 2012/06/30
Channel: borawang008
Cheap "Magnetic" clay silly putty - aliexpress
Cheap "Magnetic" clay silly putty - aliexpress
Published: 2016/10/13
Channel: Cheap Chinese Crap Review
ATOMIC FUSION is possible by PRESSURE and MAGNETIC PULSE.wmv
ATOMIC FUSION is possible by PRESSURE and MAGNETIC PULSE.wmv
Published: 2011/06/07
Channel: Romano Amodeo
MvC3 - Magnetic Pressure 100% Combo
MvC3 - Magnetic Pressure 100% Combo
Published: 2011/02/27
Channel: @KreativeMente
Magnetic Pressure
Magnetic Pressure
Published: 2014/11/11
Channel: Denis Underground - Topic
Class 8 Physics : Force and Pressure | Magnetic Force
Class 8 Physics : Force and Pressure | Magnetic Force
Published: 2017/09/21
Channel: Toppr
Magnetic roller "Zero Pressure" accumulation
Magnetic roller "Zero Pressure" accumulation
Published: 2013/08/20
Channel: Adept Conveyor
Magnetic Downstacker for ends with Pressure Reduce Unit
Magnetic Downstacker for ends with Pressure Reduce Unit
Published: 2013/01/09
Channel: Canline NL
PetSolutions: Little Giant Aquarium Series Magnetic Drive Pump
PetSolutions: Little Giant Aquarium Series Magnetic Drive Pump
Published: 2015/01/15
Channel: PetSolutions.com
RicHard-Tek - Magnetic Pressure [Hardtek NL]
RicHard-Tek - Magnetic Pressure [Hardtek NL]
Published: 2013/05/03
Channel: RicHard Tek
Magnetic Pressure
Magnetic Pressure
Published: 2016/01/01
Channel: Denis Underground - Topic
SMS collapse into SMBH magnetic pressure contour+velocity fields (MHD)
SMS collapse into SMBH magnetic pressure contour+velocity fields (MHD)
Published: 2016/08/26
Channel: Lunan Sun
7 Test Items Rosemount Magnetic Flowtube, Pressure Gauge and More on GovLiquidation.com
7 Test Items Rosemount Magnetic Flowtube, Pressure Gauge and More on GovLiquidation.com
Published: 2014/02/10
Channel: Government Liquidation
Magnetic Pressure
Magnetic Pressure
Published: 2015/03/17
Channel: Denis Underground - Topic
200% Pressure Magnetic Massage Filtration Shower Head, Great replacement for an existing shower head
200% Pressure Magnetic Massage Filtration Shower Head, Great replacement for an existing shower head
Published: 2015/10/12
Channel: Titaxutap
Magnetic Pressure 23-01-2012 12:10 / 24-01-2012 10:10
Magnetic Pressure 23-01-2012 12:10 / 24-01-2012 10:10
Published: 2012/01/24
Channel: Chris van de Wouw
Neodymium Magnets vs Hydraulic Press - Magnetic Explosion
Neodymium Magnets vs Hydraulic Press - Magnetic Explosion
Published: 2016/05/23
Channel: Hydraulic Press VS
Magnetic Pressure
Magnetic Pressure
Published: 2016/08/18
Channel: Denis Underground - Topic
Vortex shedding from a magnetic drive read-and-write head - pressure
Vortex shedding from a magnetic drive read-and-write head - pressure
Published: 2015/03/03
Channel: Andrei Horvat
Magnetic Flow Switch Explained
Magnetic Flow Switch Explained
Published: 2014/04/16
Channel: AccelTruckMounts
Pressure in magnetic photo-elastic particles
Pressure in magnetic photo-elastic particles
Published: 2016/01/02
Channel: Jonathan Barés
Titanium Pressure Reduction Magnetic Wrist Strap
Titanium Pressure Reduction Magnetic Wrist Strap
Published: 2012/11/04
Channel: imsvoy
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WIKIPEDIA ARTICLE

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Magnetic pressure is an energy density associated with a magnetic field. Any magnetic field has an associated magnetic pressure contained by the boundary conditions on the field. It is identical to any other physical pressure except that it is carried by the magnetic field rather than (in the case of a gas) by the kinetic energy of gas molecules. A gradient in field strength causes a force due to the magnetic pressure gradient called the magnetic pressure force.

The magnetic pressure force is readily observed in an unsupported loop of wire. If an electric current passes through the loop, the wire serves as an electromagnet, such that the magnetic field strength inside the loop is much greater than the field strength just outside the loop. This gradient in field strength gives rise to a magnetic pressure force that tends to stretch the wire uniformly outward. If enough current travels through the wire, the loop of wire will form a circle. At even higher currents, the magnetic pressure can create tensile stress that exceeds the tensile strength of the wire, causing it to fracture, or even explosively fragment. Thus, management of magnetic pressure is a significant challenge in the design of ultrastrong electromagnets.

The force (in cgs) F exerted on a coil by its own current is[1]

Where Y is the internal inductance of the coil, defined by the distribution of current. Y is 0 for high frequency currents carried mostly by the outer surface of the conductor, and 0.25 for DC currents distributed evenly throughout the conductor. See inductance for more information.

Interplay between magnetic pressure and ordinary gas pressure is important to magnetohydrodynamics and plasma physics. Magnetic pressure can also be used to propel projectiles; this is the operating principle of a railgun.

If any currents present are parallel to a magnetic field, the field lines follow shapes in which the magnetic pressure gradient is balanced by the magnetic tension force. Such a field configuration is called force-free because there is no Lorentz force (). The familiar potential magnetic field is a special case of a force-free field: potential field configurations occupy space that contains no electric current at all.

The magnetic pressure is given in SI units (P in Pa, B in T, μ0 in H/m) by

and in cgs units (P in dyn/cm², B in G) by

.

In practical units,

See also[edit]

Notes[edit]

  1. ^ Garren 1994, p. 3425

References[edit]


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