In power transmission why inductance L increases with increased spacing

[jim hardy]

so why is L because of the blue flux ignored?

because your blue flux line does not pass through the area enclosed by your current loop.
So it doesn't link the turn(s) of your inductor...

 

[jaus tail]

Okay. Thanks a lot.
The reason i didn't draw end view earlier was cause i didnt know what an end view is. Here we have front view, top view and side view.

 

[jim hardy]

Here we have front view, top view and side view.

Ahhh real drafting ! ok, call it front view...