Coil EMF volt vs current

[Phil Hobbs]

To add more turns, once the core is full you need a bigger core. You
get into the same bind with a core once you start going to larger and
larger cores. All the turns get longer when you go to a bigger core.

I understand that...it's just that to make a scaling argument, you have
to be clear what you're keeping constant.

Cheers,

Phil Hobbs