Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

# Magnetic Field of a Linear Quadrupole Using the Magnetic Sensors Inside the Smartphones

Version 1 : Received: 26 January 2018 / Approved: 26 January 2018 / Online: 26 January 2018 (16:17:43 CET)

How to cite: Escobar, I.; Ramirez-Vazquez, R.; Gonzalez-Rubio, J.; Belendez, A.; Arribas, E. Magnetic Field of a Linear Quadrupole Using the Magnetic Sensors Inside the Smartphones. Preprints 2018, 2018010257. https://doi.org/10.20944/preprints201801.0257.v1 Escobar, I.; Ramirez-Vazquez, R.; Gonzalez-Rubio, J.; Belendez, A.; Arribas, E. Magnetic Field of a Linear Quadrupole Using the Magnetic Sensors Inside the Smartphones. Preprints 2018, 2018010257. https://doi.org/10.20944/preprints201801.0257.v1

## Abstract

We believe that a natural focus of the Physics Education Research community is on understanding and improving student learning in our physics courses. For this purpose, we are introducing smartphones in the physics laboratory. Current smartphones measure each component of the magnetic field, bearing in mind that any current perpendicular to a magnetic field produces a small potential difference, transversal to the said current, being this voltage easily measurable by Hall sensors. In this work, we have considered the magnetic field created by a linear quadrupole and we have studied its dependence on distance. Using an experimental procedure that is simple we have measured the magnetic field using the Hall sensor that most smartphones have, together with the corresponding app. The purpose of this work is to show that the laboratory is a powerful tool that increases significant learning under three conditions: 1) the practice must not be too sophisticated; 2) students must handle objects in the lab; and 3) the practice must be scientifically accurate, including the adjustments by minimum squares, and the following and necessary error calculation.

## Keywords

smartphone; magnetic sensor, magnetic field; lab physics; quadrupole

## Subject

Physical Sciences, Particle and Field Physics

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