An Alternative Introduction to Maxwell's Displacement Current

• Autores: Gary Reich
• Localización: The Physics Teacher, ISSN 0031-921X, Vol. 51, Nº. 8, 2013, págs. 485-486
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • In introductory texts Ampere's law is generally introduced in the steady-current form ?B·dl=µ0I , and it is later extended to a more general form 1�4 involving the socalled displacement current Id , ?B·dl=µ0(I+Id). (1) Here the line integral is to be taken along a closed Amperian loop, and I is the net conventional current that penetrates any surface bounded by the loop. In its steady-current form (without Id ), Ampere's law is used to find the magnetic field generated by highly symmetric arrangements of current-carrying wires, for example, an infinite straight line of current or an infinite solenoid, in analogy with Gauss's law.