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Homework Help: 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


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    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.
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