Salt solutions with two or more salts generate ion currents analogous to magnetic field lines
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A gradient of a single salt in a solution generates an electric field but not a current. Recent theoretical work by one of us [P. B. Warren, Phys. Rev. Lett. 124, 248004 (2020)0031-900710.1103/PhysRevLett.124.248004] showed that the Nernst-Planck equations imp... ...
