JOURNAL ARTICLE

Precise Measurements Using a Smartphone's Magnetometer—Measuring Magnetic Fields and Permeability.

  • Published In: Physics Teacher, 2023, v. 61, n. 1. P. 36 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Wannous, Jarier; Horvath, Peter 3 of 3

Abstract

This article focuses on using a smartphone's magnetometer to measure the magnetic permeability of a vacuum in a high school physics setting. It provides detailed instructions for constructing a coil with negligible length and using the smartphone sensor to experimentally derive the equation for the magnetic field at the coil's center, demonstrating direct proportionality to current and coil turns and inverse proportionality to coil diameter. The method enables low-cost, inquiry-based experiments that yield permeability values consistent with accepted standards. Additionally, the article discusses related activities such as measuring the magnetic field of a wire, exploring material permeability via smartphone covers, and determining the tangential component of Earth's magnetic field using the coil and smartphone compass apps.

Additional Information

  • Source:Physics Teacher. 2023/01, Vol. 61, Issue 1, p36
  • Document Type:Article
  • Subject Area:Engineering
  • Publication Date:2023
  • ISSN:0031-921X
  • DOI:10.1119/5.0033597
  • Accession Number:161028611
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