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Homework Help: Magnetic fields

  1. Sep 16, 2010 #1
    1. The problem statement, all variables and given/known data

    Derive the equation that would allow you to calculate the speed of the electrons from the accelerating potential.

    2. Relevant equations

    Fnet=ma
    Ek=1/2mv^2
    Ft=mv


    3. The attempt at a solution
    F=mv/t F=ma
    a=v/t ?????

    I'm not even sure what it means by accelerating potential...
     
  2. jcsd
  3. Sep 16, 2010 #2

    rock.freak667

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    That just means that an electrical source is providing a potential difference to accelerate the electron from rest to velocity 'v' .
     
  4. Sep 16, 2010 #3
    Fe=Eq
    F=mv/t
    q=mv/tE
    is that what it means?
     
  5. Sep 16, 2010 #4

    rock.freak667

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    Work done by a pd = VQ, charge of an electron is e.
     
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