Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Calculate Voltage or EMF from Charge difference

  1. Mar 21, 2009 #1

    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




    Reference:Physics (second edition), by Hausmann and Slack.
    page 450
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Calculate Voltage Charge Date
How to calculate voltage drop Feb 28, 2018
High Current low Voltage Sep 17, 2017
Threshold voltage calculation of a CMOS gate May 24, 2017
Voltage Regulator Circuit Calculations May 6, 2017
PNP Transistor voltage calculation Apr 1, 2017