Characteristics of and Control over Resonance in the Electromotive Force of Electromagnetic Induction

Sang Don Bu, Jin Kyu Han, Jin Young Hyeon, Gi Gwan Kim

Department of Physics, Chonbuk National University, Jeonju, South Korea.

DOI: 10.4236/jemaa.2013.58049                

Abstract

The principles of electromagnetic induction are applied in many devices and systems, including induction cookers, transformers and wireless energy transfer; however, few data are available on resonance in the electromotive force (EMF) of electromagnetic induction. We studied electromagnetic induction between two circular coils of wire: one is the source coil and the other is the pickup (or induction) coil. The measured EMF versus frequency graphs reveals the existence of a resonance/anti-resonance in the EMF of electromagnetic induction through free space. We found that it is possible to control the system’s resonance and anti-resonance frequencies. In some devices, a desired resonance or antiresonance frequency is achieved by varying the size of the resonator. Here, by contrast, our experimental results show that the system’s resonance and anti-resonance frequencies can be adjusted by varying the distance between the two coils or the number of turns of the induction coil.

Keywords

Electromagnetic Induction; Electromotive Force; Resonator, Resonance/Anti-Resonance Frequency

Conflicts of Interest

The authors declare no conflicts of interest.

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