College Physics ›› 2020, Vol. 39 ›› Issue (05): 31-32.doi: 10.16854 /j.cnki.1000-0712.190402

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Measuring the magnetic field of Helmholtz coil with the magnetic sensor of a smart phone

LIU Wei,CHENG Min-xi   

  1. School of Physics and Telecommunication,South China Normal University,Guangzhou,Guangdong 510006,China
  • Received:2019-09-05 Revised:2019-10-13 Online:2020-05-20 Published:2020-05-17

Abstract: The magnetic sensor in the smart phone is located by a pre-experiment. The magnetic field distribution throughout the axle wire of Helmholtz Coil is measured,Biot-Savart Law and magnetic field’s superposition principle are verified by a handy and precise new measurement method.

Key words: smart phone, magnetic sensor, Helmholtz Coil, superposition principle, Biot-Savart Law