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

Two point charges + q1 and + q2 are fixed with a finite distance d between them.It is desired to put a third charge q3 in between these two charges on the line joining them so that the charge q3 is in equilibrium.What has to be the charge on q3 to make this possible/

2. Relevant equations

Coulomb's law

3. The attempt at a solution

I think the answer is that q3 is positive,since if it is negative,the equilibrium will be iunstable.But what if q1 and q2 are not fixed?Will q3 have to be negative then?

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# Homework Help: System of charges

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