Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Rotating metalic bar and ddp

  1. Feb 20, 2010 #1
    rotating metalic bar and potential difference

    Hi All,

    I have been thinking of this lately and had no answer.

    Consider we have a metalic bar rotating around one of its ends. Centrifugal force will appear inside the bar. It seems natural to think that electrons will suffer larger displacements than protons. Thus a potential difference seems to arise. If all this is correct, what do we need (complementary information, for instance) in order to calculate the potential difference from:

    the lenght L
    the mass
    the volumetric density
    the resistance
    the angular velocity.


    Best wishes

    Last edited: Feb 21, 2010
  2. jcsd
  3. Feb 21, 2010 #2
    i don't know what you mean with ddp.

    Despite i suggest that you take a look at the experiment which Richard Tolman conducted in 1916. That would have led you in the right direction.
  4. Feb 21, 2010 #3
    Re: rotating metalic bar and Potential Difference

    Sorry, I used a portuguese shortage for potential difference (Diferença De Potencial). I have it corrected now in the OP.

    Thank you ( I will search for this reference Tolman).

    Best Wishes

    Last edited: Feb 21, 2010
  5. Feb 21, 2010 #4
    Thank you.

    Nice reference.

    Best Wishes

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook