A Figure in Griffiths' Intro to Electrodynamics I am really loving this book. But I have come across a figure whose purpose I just don't understand. It is shown when Griffiths is introducing the concept of self-inductance. He talks about how a changing current not only induces an electromotive force in other loops, but in itself as well. Then he refers the reader to the attached figure. I have no idea what to make of the intended point for this figure. The phenomenon in question is due to a changing current. There is no hint of a change in time for the current in the figure. I am guessing he intends to make a point about these B fields going through these tiny loops inside the main loop? I simply don't get it. Anyone have an idea about the intended meaning of the figure in the context of self-inductance? (stressed to deter an answer that would consist of: "current in a loop generates a B field!") Just to be clear, I understand the concept just fine, I am merely curious about the figure.