[Avodah] induction cooking

[M Cohen]

RMP writes ... Does anyone know of any information concerning this
increasingly popular form of cooking where electromagnetism causes the food
to heat up without heating the pot or range?

this is NOT correct - induction cooking heats the pot, which then heats the
food
(btw, microwave cooking does indeed causes the food to heat up without
heating the pot or range)

see http://theinductionsite.com/how-induction-works.shtml

How does cooking on such a range work on Shabbos and Yomtov?
as any normal stove

Is *removing* a pot a problem since it effectively stops the heating
process?
of course

Can there be a blech where the source of heat is the food itself?
I don't see how a blech is possible, because it's not possible to place a
blech between the heat source (the pot) and the food. 
perhaps b'dieved to rely on the opinions that one can cover the knobs (as
some do for crockpots)

mordechai cohen