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The electric potential at a point that is halfway between two identical charged particles is 300 V. What is the potential at a point that is 25% of the way from one particle to the other?
Answer: V2 = 400V
We can start a solution with expression for the potential of a point charge:
In the middle between two charges potential is:
Potential at a point that is 25% of the wat from one particle to the other is:
If we substitute in the previous equation we get: