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Hall effect and force

  1. Dec 19, 2008 #1


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    1. The problem statement, all variables and given/known data
    There is a metal bar was suspended by a spring between the ceiling and its top. Apply an electric field, from left right. Find out what happen with the bar after applying and magnetic field perpendicular to the electric filed and point out of page.

    2. The attempt at a solution
    When we apply the magnetic field, negative charge start to be moved from the bottom to the top due to the hall effect. In this stage, the bar will suffer extra Lorentz force downward, so the spring will suffer a downward force also. After some time, when more and more negative charge being moved to the top of the bar, an uniform electric field was established and pointing from bottom to the top to balance out the Lorentz force so the spring restore back it the equilibrium position. I am wondering if my analysis is correct or not?
  2. jcsd
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