Faraday’s Law Teaching Aids Using Magnetometers on Smartphone and Infrared Sensors for Electromagnetic Induction Learning

Abstract

Faraday’s law is one of the abstract physics materials. This research aims to develop Faraday’s Law teaching aids by combining smartphones and infrared sensors. This study uses the Research and Development method, which refers to the ADDIE model. The teaching aids consist of a 45 cm coil whose area is, a 4000 µT neodymium permanent magnet, an Arduino integrated infrared sensor, and a smartphone’s magnetometer sensor using the Phyphox application. The research trials were carried out by varying the number of coils and the height of the falling magnet. The test results obtained data in a magnetic field, the magnetic time passing through the coils, and voltage. Based on the induced emf obtained from observations and calculation results, there is an increase in the number of coils and the height of the falling magnet. This study concludes that Faraday’s law teaching aids can show the effect of the number of coils and the distance of the magnet falling on the magnitude of the induced emf. The developed Faraday’s law teaching aids can be used in the learning process of Faraday’s law.