1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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

    User Avatar
    Homework Helper

    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

    User Avatar
    Homework Helper

    Work done by a pd = VQ, charge of an electron is e.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook