Quote:

From the same Wiki article.

Self Variable Resistors




You will never find, in any electronics technical reference, theory textbook, nor will you ever hear an electrical engineer refer to something as a "self variable resistor."

What I'm trying to tell you is, there are fixed resistors, and there are ballast resistors.

Ballasts BY DESIGN are designed to change resistance on a far greater scale. That is WHY they are referred to as "ballasts."