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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" ????

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# Calculate Voltage or EMF from Charge difference

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