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

Determine at what point or points (not including points at infinity) the electric field vanishes.

2. Relevant equations

3. The attempt at a solution

Well, this seems to be a conceptual question and as I must be missing the concept, I don't know how to attempt to even think about it. Any help would be greatly appreciated.

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# 2 identical charges @ x=a & x=-awhere does E field vanish?

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