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Is it possible that apart from positive and negative charges, there is a third kind of charge that we have somehow, not discovered yet?

If not, is there some proof of the existence of only two types of charges?

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    $\begingroup$ How could we ever prove such thing? Just because we've never seen something like it, does not mean it can't exist. $\endgroup$
    – user224659
    May 15, 2020 at 12:04
  • $\begingroup$ Right, that's what I thought. But I also thought that maybe some "higher" field of Science deals with this kind of stuff (theoretical Physics, maybe). I wasn't sure, so I asked this here. $\endgroup$ May 15, 2020 at 12:08
  • $\begingroup$ By the way, hypothetically, let's say that we find another type of charge someday. Which is more likely : the type of charge always existed but we never noticed that or it gets discovered under some "special" artificial conditions. $\endgroup$ May 15, 2020 at 12:09
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    $\begingroup$ what properties do you think such a charge would have? $\endgroup$
    – user224659
    May 15, 2020 at 12:12
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    $\begingroup$ Not to forget color charges designed to describe the strong interactions hyperphysics.phy-astr.gsu.edu/hbase/Forces/color.html $\endgroup$
    – anna v
    May 15, 2020 at 12:17

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If we did discover some other phenomenon for which the description "charge" was appropriate, we would not call it an electrical charge. For example the gluons which bind an atomic nucleus together carry a triple-state charge which is called "colour charge" after the three primary colours of vision. The theory of electromagnetism is a complete and consistent description of certain natural phenomena. Anything coming outside that set of phenomena would come outside the theory of electromagnetism and we would not call it electrical charge.

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  • $\begingroup$ I think I get it, partially. Thanks :) $\endgroup$ May 15, 2020 at 13:08

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