MAGNETIC FIELDとは 意味・読み方・使い方

名詞

magnetic field (plural magnetic fields)

1. (physics) A condition in the space around a magnet or electric current in which there is a detectable magnetic force and two magnetic poles are present.
   • 1983, Ronald T. Merrill, Michael W. McElhinny, The Earth's Magnetic Field: Its History, Origin, and Planetary Perspective, Academic Press, page 135:

     David (1904) and Brunhes (1906) first observed magnetizations in lava flows that were roughly opposed to that of the present earth's magnetic field.

   • 1996, V. R. Khalilov, Electron Strong Magnetic Field, [1988, V. R. Khalilov, Elektroni v silnom magnetom poli, Energoatomizdat, Moscow], Gordon and Breach Science Publishers, page 123,

     In contrast to the IQHE, the fractional quantum Hall effect occurs in much stronger magnetic fields, and in this case electrons cannot be considered as noninteracting ones.

   • 2007, Eugene N. Parker, Conversations on Electric and Magnetic Fields in the Cosmos, Princeton University Press, page 25:

     The magnetic field B bears the same relation to a hypothetical magnetic charge m as the electric field bears to the electric charge q, so the development of the previous chapter can be taken over completely. The stress tensor for a magnetic field B_i is identical in form to that for the electric field. The energy density is obviously B/8π and the magnetic field is a physical reality just like the electric field. Electric and magnetic fields superpose linearly […] . This is perhaps a convenient place to remark that a magnetic field exerts no force whatever on an electric charge.

   • 2008, BioWare, Mass Effect, Redwood City: Electronic Arts, →ISBN, →OCLC, PC, scene: Turians: Biology Codex entry:

     The turian homeworld, Palaven, has a metal-poor core, generating a weak magnetic field and allowing more solar radiation into the atmosphere.

   • 2023 November 15, Prof. Jim Wild, “This train was delayed because of bad weather in space”, in RAIL, number 996, page 30:

     The scientific instruments of the day recorded rapid fluctuations in the Earth's magnetic field, as powerful electrical currents flowed through the upper atmosphere.

   1. (modern) B-field.
   2. (dated) H-field.

同意語

• (B-field): magnetic flux density, magnetic induction
• (H-field): magnetic field intensity, magnetic field strength, magnetizing field

派生語

• magnetic field deficiency syndrome

参考

• magnetism
• electromagnetism

Further reading

• magnetic field on Wikipedia.Wikipedia
• Field (physics) on Wikipedia.Wikipedia
• Force field (physics) on Wikipedia.Wikipedia
• Electric field on Wikipedia.Wikipedia
• Electromagnetic field on Wikipedia.Wikipedia
• Classical electromagnetism on Wikipedia.Wikipedia