Talk:Nernst–Planck equation
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What is phi?
[edit]This article doesn't say anywhere. —Preceding unsigned comment added by 24.13.162.248 (talk) 05:17, 5 October 2010 (UTC)
It's the electric potential; the first equation defines the electric field as where, according to "standard usage" is the electric potential and is the magnetic (vector) potential --Osquar F (talk) 08:12, 15 August 2012 (UTC)