作者carbocation2013

基本上沒錯...唯一錯的地方是這裡沒任何的半導體=.=
(不知道是不是台灣理工人的通病??凡事都往到半導體想去了)

基本上導體導電的機制就只有電子,而電子行進時遭到散射的機制
也不完全相同!

所以看wiki對drift velocity定義就知道"The drift velocity is the average velocity
that a particle, such as an electron, attains due to an electric field. In
general, an electron will 'rattle around' in a conductor at the Fermi velocity randomly.
An applied electric field will give this random motion a small net velocity in one direction."

上色部分就說明了2的答案

這話令人看不太懂,如果想說的是電場,應該會是KQ/r^2,你把靜電力跟靜電場搞混了

不對電壓值=電位差=電場函數對路徑積分