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Homework Statement
You are given two unknown point charges, Q_1 and Q_2 . At a point on the line joining them, onethird of the way from Q_1 to Q_2 , the electric field is zero (see figure). The charges are separated by length, L.
What is the ratio of the charges Q_{1}/Q_{2}?
Homework Equations
F=k(Q_{1}Q_{2})/r^{2}
The Attempt at a Solution
I tried to put one charge in terms of the other, but I got lost and it seemed to be going nowhere. I'm stuck..
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