(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The potential equals 7.52 V at the midpoint between two point charges that are 0.91 m apart. One of the charges is 1.11 x 10-9 C. Find the value of the other charge.

2. Relevant equations

V = k [sum] (q/r)

3. The attempt at a solution

7.52=k[(1.11 x 10-9 / 0.455m ) + ( x / 0.455m )]

This gives me -7.3x10^-10, which is incorrect, but I cannot think of any other way to approach this problem.

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# Homework Help: Electric Potential-finding unknown charge

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