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Before doing the experiment with the current in the coil you can put your smartphone on a table directed to the south.
I got 41 microT. That's the local strenght of the magnetic field of the earth.
You have to substract it from the mesurements of the magnetic field in the coil.
I got a fairly good value for the magnetic permeability of air using a coil of 10 turns of wire on a plastic bottle.

Messages In This Thread
magnetometer - by manuboltri - 12-14-2018, 06:04 PM
RE: magnetometer - by Sebastian Staacks - 12-14-2018, 10:22 PM
RE: magnetometer - by manuboltri - 12-15-2018, 12:03 AM
RE: magnetometer - by Roland Van Kerschaver - 12-16-2018, 02:32 PM

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