Re: New Apple invention :)
> Also could it be set to work in reverse so users have to
> ability to warm a bagel on a metal phone cover?
Yes, I’m sure you could inductively couple into a bagel or a ring doughnut if it were sufficiently conductive.
Of course non-ring-shaped food items would be more difficult. Perhaps it would create a market for ring-shaped Cornish pasties? Just avoid curly-wurlies - I reckon that “ladder” topology would act like some kind of voltage multiplier...