How does partially sliding the core into the coil affect inductance?

Question

I understand how the number of turns makes a difference, but I can’t find anywhere what happens(or why) if the core is not fully in. I also didn’t find any circuit diagrams that would at least explain it numerically

In: 4

Answer 1

The greater the amount of the core in the solenoid, the greater the inductance. This is one of the primary means of making a variable inductor. Turning the terminal increases or decreases the amount of core within the solenoid which varies the inductance appropriately.