DESIGN AND MANUFACTURE A DEVICE OF ELECTROMAGNETIC INDUCTION EQUIPMENT FOR TEACHING PHYSICS EXPERIMENTS

Lưu Thi Nhạn

doi:10.34238/tnu-jst.12693

DESIGN AND MANUFACTURE A DEVICE OF ELECTROMAGNETIC INDUCTION EQUIPMENT FOR TEACHING PHYSICS EXPERIMENTS

About this article

Received: 28/04/25 Revised: 30/06/25 Published: 30/06/25

Authors

Luu Thi Nhan , Hanoi University of Industry

Abstract

In this study, the author designed and fabricated an experimental apparatus to investigate the phenomenon of electromagnetic induction based on the principle of determining the induced electromotive force resulting from a varying magnetic flux in a closed circuit. A coil with specified area and number of turns was placed within the magnetic field of a rotating magnet. As the rotational speed of the magnet was varied, an induced electromotive force was generated in the coil. Using the constructed apparatus, the power generation effect of the coil was evaluated by placing it in the magnetic field of the rotating magnet. Experimental results obtained from a coil with 350 turns and a diameter of 51.9 mm showed that an induced electromotive force appeared in the circuit as the angular velocity ω of the magnet changed. Notably, when ω ≈ 2300 rpm, the light bulb connected to the circuit began to emit light. Furthermore, the relationship between the induced electromotive force and the rotational speed of the magnet was found to be nearly linear, with a correlation coefficient as high as R² = 0.9988. The results obtained from this custom-designed experimental apparatus demonstrate its potential applicability in physics laboratory instruction at educational institutions.

Keywords

Physics experiment; Electromagnetic induction; Electromotive force; Rotation speed; Induced Current

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DOI: https://doi.org/10.34238/tnu-jst.12693

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