an inductive hob or cook thing.

an inexpensive stew pots have circular indentations in the center of
the pots.

so i wonder if the bottom of the pot sits off the bottom of an
inductive hob or glass cookware, will it make the heating too
inefficient?

i asked the manufacturer but english was not the native language so i
could not get through. finally i went physical. i pointed out that the
usual rule of thumb with this type of electromagnetic energy was 1 over
the radius of the distance cubed, so it drops off dramatically.
thank goodness for science. but science was also not the native
language of the tech department, so we'll see.

i am looking at a sunpentown sr-1851 which unlike the slightly more
expensive sr-1881 has a kind of raised circle for the inductive
heating.

any thoughts?