I more mean in reference to using them as an opposing magnetic field for using in an electric motor. Like suppose he simply put two PCB electromagnets together. What would you expect the force to be?
I'm sorry I read your comment as a general statement on electromagnets. Yes, two PCB based electromagnets are not going to be able to make a very dense magnetic field. The major reason is that the current carrying capacity and cooling will be lousy. But a sizeable electromagnet made from a copper coil and a half decent core material will happily lift your car.
