I found this post in one of the forum. I am not sure if this an experimental proof. "Why does the resistance of an inductor increase when an iron core is introduced?"
To tech99. The DC resistance you might be reffering is due to the winding of the wire, which will always be constant regardless of the core. This is the basis of voltage drop. I am curious if the core has effect on voltage drop in addition to the wire windings.
Suppose you have a pure DC supply with a constant current to an inductor. And you change the core of the inductor from air to iron, leaving the current remain the same. You may try changing to other materials. Does the voltage drop across the inductor will remain the same for any core? Anyone...