I am trying to understand the skin effect, there is a bit in Wikipedia article I don't understand;
"...The change in the magnetic field, in turn, creates an electric field which opposes the change in current intensity. This opposing electric field is called “counter-electromotive force” (back EMF). The back EMF is strongest at the center of the conductor, and forces the conducting electrons to the outside of the conductor, as shown in the diagram on the right."
Why is the induced EMF strongest at the center of the conductor?