The effect of ferromagnetic rod on the magnetic field

Abstract

The magnetic material can be classi_ed by the response of material to the external magnetic field as the paramagnetic, diamagnetic or ferromagnetic material. The ferromagnetic material can be highly attracted to magnets and become permanently magnetized. Iron, nickel, cobalt, and some alloys are typical ferromagnetic materials. When they are placed near a strong magnet, this may alter the magnetic field. The change in the magnetic field is determined using a magnetometer sensor on a smart phone. In this study, we will use the iPhone 7 plus which has magnetic sensors called the MAGNESIUM IC (U2402), model# HSCDTD601A-19[5] to determine the magnetic field lines. First, we locate the position of the probe of the sensor on the smartphone. Then, limitations of this method are also studied. We measure three components of magnetic field from a magnet at various positions. Finally, we determine the magnetic field due to the presence of ferromagnetic objects.