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i'd like to use phyphox to verify Biot-Savart law and magnitude of the magnetic field inside a coil with my kids (last year of high school, 19 years old).
I run into some issues:
-i try to set my phone in a certain position in order to have no component of the earth field along a certain direction, for example x axe, so I put it with y axe along a compass needle but i can never see it measuring 0μT. The direction assumed by the phone when the x component of B is 0 is about 25 degrees different from the compass needle one. Is it because of the phone magnetic field?
-when a DC current  (0,45/1,4A) flows, an extra B is visible: it changes up to 34, 35 μT, visible enough on the x window, but it's oscillating and not constant. I really don't know why.

in this screenshot I tried with 3V, 6V and 9V and a resistor of 2,5 ohm

any hint?
thank you

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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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