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skt1BOXER

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## Homework Statement

There is a +1 micro-coulomb charge at the origin and a -3 micro-coulomb charge at 2 meters away along the x-axis. I am suppose to find the change in Voltage if second charge is moved to 4 meters away from the origin.

## Homework Equations

I am thinking of using delta V= - integral of E(x)dx , where the limits of integration is from 2 to 4.

## The Attempt at a Solution

i am not sure why the negative three micro-coulomb isn't included when using this equation. can someone explain why?