Before revision: In electrical and electronics engineering, wetting current (sometimes also spelled as whetting current in archaic sources ) is the minimum electric current needing to flow through a contact to break through the surface film resistance at a contact.
After revision: where the root term "whet" means to sharpen or restoreIn electrical and electronics engineering, wetting current (sometimes also spelled as whetting current in archaic sources ) is the minimum electric current needing to flow through a contact to break through the surface film resistance at a contact.