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: Velocity of Electron through potential difference

  1. Jul 3, 2008 #1
    Using your actual knowledge of the actual charge of an electron and the mass of an electron, determine he velocity of an electron that has been accelerated across a potential difference of 100000 volts.

    Please show me how to do this question. Thanks
  2. jcsd
  3. Jul 3, 2008 #2
    Hint: when the electron in accelerated over the potential difference, its kinetic energy increases. Is there an equation that relates the electron's energy to voltage?
  4. Jul 6, 2008 #3
    are you able to give me a little bit more infomation about how you find it. I don't really get this topic that well. Thanks
  5. Jul 6, 2008 #4


    User Avatar
    Homework Helper

    Energy supplied by the pd is VQ=Ve (e is charge on the electron) and all that energy goes into increasing the kinetic energy of the electron (what's the formula for kinetic energy?)
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook