Can Potential Energy Have Zero Value?

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phykeep
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hi,
Can the potential energy (electro statistical interaction energy) be zero of a system consisting 2 or more point charges or charges distributed on continuous masses like rings,discs etc.?
I am confused if there exists any such case..can anyone of u give clarification to this doubt?
 

Discussion

The potential due to a charge is kq/r. What happens if you have two charges of opposite signs?
 

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