Suppose you have a current source with magnetic field and you want to reduce it by adding a metal near it to induce opposite magnetic field to cancel the one from the source (partially). What coil configuration must you use? Is this possible?
Don't reply by telling me to use particular wire shielding or bend the source wire. I'm just interested in the theoretical rationale of putting metal or coil configuration near the magnetic field source to create reverse magnetic field to cancel a part of it. How much magnetic field do you think is reduced (or cancelled)?? This is assuming the metal or coil put near it doesn't have any voltage or current source itself but just from the induced current from the magnetic field of the source.