電子 入磁場問題2

Q: 仲有呢 其實係咪 一條導線有固定既電勢差 電子通過 後有磁場產生。 唔用右手握拳定則， 可唔可以微觀d 解比我聽 點出現 .

A: Be aware that the Right Hand Grip Rule (右手握拳定則) only gives you the direction of the magnetic field. It doesn't explain why there is a magnetic field produced. Classical physics theory cannot explain such phenomenon. The production of magnetic field associated with moving charges can only be explained by modern physics, such as relativity or quantum electrodynamics.

Q: 係咪在垂直既磁場中 一條導線有固定既電勢差 電子通過 都會有霍耳電壓出現 ?

A: In principle, this is true. But in a thin wire, the Hall voltage (霍耳電壓) so produced would be too small to be measurable.

Q: 霍耳電壓 次序係咪 1電子進入垂直既磁場2.受磁力影響電子圓周運動(導致電子积聚 )3.電子积聚 兩側直至磁力=電力4. 產生電勢差

A: Correct.