[領域]大學普物電學                             (題目相關領域)

[來源]課本習題                             (課本習題、考古題、參考書...)

[題目]An electron moves in a circle of radius r around a very long uniformly
      charged wire in a vacuum chamber. The charge density on the wire is
      λ=0.14μC/m.
      (a) What is the electric field at the electron (magnitude and direction)?
      (b) What is the speed of the electron?
      (圖: http://0rz.tw/182xh)


[瓶頸]我猜測電場是2λk/r，但是後面的我就不會算了...
      然後我也不確定電場是不是真的跟我猜的一樣...

--
※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 140.113.187.150