BIG question : is magnetic field just energy which can be re-used infinitely if not disturbed too much ? That would be marvellous ! I have yet not found definitive answer.Some curious old information seems to confirm that pioneers of electrical science used Faraday induction law quite differently. Many dynamo-electric generators from 1800 was made with rotating iron-less coils for example, where the magnetic field is not broken at all. Remember : do not kill the dipole !
If they worked fine then why was the concept forgotten ?


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