Calculate Voltage or EMF from Charge difference

AI Thread Summary
To calculate voltage or EMF from charge differences, one can use the formula V = Q/C, where V is voltage, Q is charge in coulombs, and C is capacitance in farads. The discussion highlights a scenario with differing electron counts at two locations, emphasizing the need for a method to derive voltage from charge differences rather than forces or electric fields. Coulomb's Law and Maxwell's equations are mentioned as foundational concepts, but the focus remains on voltage calculation. The example provided illustrates a battery with varying charge at its nodes, reinforcing the need for a clear relationship between charge and voltage. Understanding these principles is essential for accurately determining voltage or EMF from charge differences.
arvindmer
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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" ?
 
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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 ?
 
V=Q/C

V=volts

Q=coulombs

C=farads

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

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