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Re: First Law (now perpetual motion)



Herbert H Gottlieb wrote:

Similarly, if a small section of a wire is stretched from wintip to
wingtip of an airplane and the rest of the wire is covered by magnetic
shielding, we should have the changing flux through the loop that you
say is necessary.

This is not clear. Consider a wire in terrestrial field. You shield it
with a thick mu-metal cylinder. The field lines do not disappear, they
just "prefer to travel" through the shield. Are you thinking about a
shield which is a half-pipe over one section of your loop?