Proton cuircuits and proton motive force are part of standard discussion in biology and processes involving photosynthesis. The sort of proton currents discussed in biology are obviously slightly different than the magnetically confined proton currents in an acclerator like LHC, however, although we are very familar with electronic circuitry, I was wondering if there are example of protonic circuitry outside of biological processess.
Current in any acid electrolyte (eg a lead accumulator) is carried predominantely by hydronium ions (real protons do not exist in water). Due to the about tenfold mobility of hydronium ions compared to all other cations, in acid solution charge transport is almost by hydronium alone.
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One cannot use the example of lightning since that has nothing to do with proton current. The way lighting works is when to clouds cross each other and "rub" against each other one cloud removes a lot of electrons from the other. One cloud will have extra electrons and one cloud have missing electrons.The one missing the electrons will have a positive charge and the one that gains electrons will have a negative charge. If this process is significantly high it creates high static charges Charges that are significantly high to create a potential (voltage) of say a million volts will cause electrons to flow through air. Also though air is considered an insulator all insulators have a resistant value in OHMS like in the area of mega ohms Using ohms law E over I times R E=volts I =current (electron flow rate) R= resistance in ohms A sufficient voltage will cause current to flow through the airs high resistance and create a large arc to ground or from cloud to cloud. This we see as lightening.