Hidden momentum and the electromagnetic mass of a charge and current carrying body
作者:
V. Hnizdo,
期刊:
American Journal of Physics
(AIP Available online 1997)
卷期:
Volume 65,
issue 1
页码: 55-65
ISSN:0002-9505
年代: 1997
DOI:10.1119/1.18789
出版商: American Association of Physics Teachers
关键词: LINEAR MOMENTUM;RELATIVITY THEORY;ELECTROMAGNETIC FIELDS;ENERGY-MOMENTUM TENSOR;CHARGED PARTICLES;ELECTRODYNAMICS;COULOMB FIELD;ELECTRONS;03.30;41.
数据来源: AIP
摘要:
The contribution of the electromagnetic self-field to the energy and momentum of a charge and/or current carrying body is considered within classical physics and discussed in simple terms using nontrivial exactly solvable examples. The Lorentz-transformation properties of the energy and momentum of the body can be maintained by taking into account the relativistic effects of the mechanical stresses due the sources of the self-field, or by separating the energy and momentum of a moving self-field from those of a nonelectromagnetic origin in a relativistically covariant way. In either procedure, a proper account must be taken of the hidden mechanical momentum that, in general, is contained in a stationary body that carries both charge and current, and which is equal and opposite to the momentum of the static electromagnetic self-field. Hidden momentum and the momentum of a static electromagnetic field are indispensable concepts of direct physical significance in classical electrodynamics.
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