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The moving magnet and conductor problem is a famous thought experiment, originating in the 19th century, concerning the intersection of classical electromagnetism and special relativity. In it, the current in a conductor moving with constant velocity, v, with respect to a magnet is calculated in the frame of reference of the magnet and in the frame of reference of the conductor. The observable quantity in the experiment, the current, is the same in either case, in accordance with the basic principle of relativity, which states: "Only relative motion is observable; there is no absolute standard of rest". However, according to Maxwell's equations, the charges in the conductor experience a magnetic force in the frame of the magnet and an electric force in the frame of the conductor. The same

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  • Transformations de Lorentz du champ électromagnétique (fr)
  • Moving magnet and conductor problem (en)
  • 移動中的磁鐵與導體問題 (zh)
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  • Les transformations de Lorentz du champ électromagnétique permettent de déterminer ce que devient le couple champ électrique - magnétique quand on passe d'un référentiel inertiel à un autre sans avoir à résoudre (à nouveau) les équations de Maxwell pour les déterminer. (fr)
  • 移動中的磁鐵跟導體問題（moving magnet and conductor problem）是一個源自於19世紀的著名思想實驗，涉及到（）的交叉領域。在這問題裏，相對於磁鐵的參考系，導體以均勻速度 移動。從磁鐵的參考系與導體的參考系分別觀測，流動於導體的電流相同。這事實遵守基本「相對性原理」：沒有絕對靜止標準，只可以觀測到相對運動。但是，根據馬克士威方程組和勞侖茲力定律，導體的電荷，在磁鐵參考系會感受到磁場力，而在導體參考系會感受到電場力。從不同的參考系觀測，同樣的物理現象竟會出現大相逕庭的描述。這問題與邁克生-莫立實驗啟發了阿爾伯特·愛因斯坦的相對論。 (zh)
  • The moving magnet and conductor problem is a famous thought experiment, originating in the 19th century, concerning the intersection of classical electromagnetism and special relativity. In it, the current in a conductor moving with constant velocity, v, with respect to a magnet is calculated in the frame of reference of the magnet and in the frame of reference of the conductor. The observable quantity in the experiment, the current, is the same in either case, in accordance with the basic principle of relativity, which states: "Only relative motion is observable; there is no absolute standard of rest". However, according to Maxwell's equations, the charges in the conductor experience a magnetic force in the frame of the magnet and an electric force in the frame of the conductor. The same (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/060618_conductor_magnet.svg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Moving_magnet.png
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  • The moving magnet and conductor problem is a famous thought experiment, originating in the 19th century, concerning the intersection of classical electromagnetism and special relativity. In it, the current in a conductor moving with constant velocity, v, with respect to a magnet is calculated in the frame of reference of the magnet and in the frame of reference of the conductor. The observable quantity in the experiment, the current, is the same in either case, in accordance with the basic principle of relativity, which states: "Only relative motion is observable; there is no absolute standard of rest". However, according to Maxwell's equations, the charges in the conductor experience a magnetic force in the frame of the magnet and an electric force in the frame of the conductor. The same phenomenon would seem to have two different descriptions depending on the frame of reference of the observer. This problem, along with the Fizeau experiment, the aberration of light, and more indirectly the negative aether drift tests such as the Michelson–Morley experiment, formed the basis of Einstein's development of the theory of relativity. (en)
  • Les transformations de Lorentz du champ électromagnétique permettent de déterminer ce que devient le couple champ électrique - magnétique quand on passe d'un référentiel inertiel à un autre sans avoir à résoudre (à nouveau) les équations de Maxwell pour les déterminer. (fr)
  • 移動中的磁鐵跟導體問題（moving magnet and conductor problem）是一個源自於19世紀的著名思想實驗，涉及到（）的交叉領域。在這問題裏，相對於磁鐵的參考系，導體以均勻速度 移動。從磁鐵的參考系與導體的參考系分別觀測，流動於導體的電流相同。這事實遵守基本「相對性原理」：沒有絕對靜止標準，只可以觀測到相對運動。但是，根據馬克士威方程組和勞侖茲力定律，導體的電荷，在磁鐵參考系會感受到磁場力，而在導體參考系會感受到電場力。從不同的參考系觀測，同樣的物理現象竟會出現大相逕庭的描述。這問題與邁克生-莫立實驗啟發了阿爾伯特·愛因斯坦的相對論。 (zh)
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