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[Magnetic property of dustfall in a Northwest China valley city and its environmental implications]

Shi-Li Tian1, Dun-Sheng Xia, Ye Yu

  • 1Cold and Arid Regions Environmental and Engineering Research, Chinese Academy of Sciences, Lanzhou 730000, China. shilitian2009@163.com

Huan Jing Ke Xue= Huanjing Kexue
|December 15, 2011
PubMed

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A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
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The vector...
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Magnetostatic Boundary Conditions

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...
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A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
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