1. Not finding help here? Sign up for a free 30min 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!

Current and cross sections

  1. Sep 2, 2007 #1
    1. How do you find the current if it tells you how many electrons pass through cross section of a conductor each second

    2. ....

    3. ...I don't know the first thing to do about this. Just the number of electrons make me think of the equation Q = Ne ..but charge doesnt have to do with anything and current just makes me think of I = Q/t ...not that t has to do with anything either.
  2. jcsd
  3. Sep 2, 2007 #2


    User Avatar
    Homework Helper

    Charge has everything to do with it! What is the definition of current? You wrote it yourself, I = Q/t. So the current is the amount of charge passing a point in one second. If you know the number of electrons passing per second, then you know the charge passing per second.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?