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Calculate Voltage or EMF from Charge difference

  1. Mar 21, 2009 #1
    Hi,

    I have a problem about EMF and/or Voltage.
    Let their are 100 electron at a place A and 200 electron at place B. Now what will be the Voltage/EMF (Voltage or EMF difference)?????

    And How to calculate it ??

    In other words "How can I calculate Voltage or EMF if I know only Charge difference" ????
     
  2. jcsd
  3. Mar 21, 2009 #2
  4. Mar 22, 2009 #3
    By using Coulomb's law, force between two point charge and electric field due to a point charge at a distance r can be calculated.

    But my problem is somewhat different. I don't want force or electric field, but voltage difference.

    My question is like this Let in a battery at one node 1 Coulomb charge and at other node their are 10 Coulomb charge. Now I want to calculate Voltage or EMF (difference).

    How to do that ???
     
  5. Mar 22, 2009 #4
    V=Q/C

    V=volts

    Q=coulombs

    C=farads

    Reference:Physics (second edition), by Hausmann and Slack.
    page 450
     
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