Self-Inductance
The inductance of an inductor ( a set of coils in some geometry ..eg solenoid, toroid) then, like a capacitor, can be calculated from its geometry alone if the device is constructed from conductors and air.
If extra material (eg iron core) is added, then we need to add some knowledge of materials as we did for capacitors (dielectrics) and resistors (resistivity)
- Archetypal inductor is a long solenoid, just as a pair of parallel plates is the archetypal capacitor.
http://wug.physics.uiuc.edu/courses/phys112/fall97/acts/lect18/act18a/sld001.htm