Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. submitted time 2024-02-27
Abstract： This paper conducts electromagnetic induction experiments involving relative motion of coils and magnets, and analyses multiple cases of electromagnetic interactions. Both experimental results and analysis indicate the correctness of Weber’s hypothesis on the unipolar induction problem. Moreover, it is demonstrated that compared to the concept of magnetic field, the concept of magnetic field line is equally useful and important in explaining electromagnetic interactions.
Peer Review Status:
Awaiting Review
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc. submitted time 2023-09-15
Abstract： This paper highlights the overlooked factor contributing to the unipolar induction paradox, which is the lack of attention to the fully symmetrical distribution of magnetic field relative to rotation axis in the experimental setup. To address this, the paper proposes a set of bipolar induction experiments using a spherical magnet to explain unipolar induction. The proposed experiment is easy to implement --- we can perform both the classic unipolar induction and the bipolar induction experiments by selecting different orientation of the rotation axis with the same magnet. The two sets of experiments can be conducted following their respective procedures, and the results can be conveniently compared and analysed. In contrast to the unipolar case where both viewpoints provide reasonable explanations for all results, the difference between the explanations given by the two viewpoints becomes apparent in the bipolar induction settings. This is due to the distribution of magnetic field lines in the magnet relative to the rotational axis no longer being fully symmetrical. Such differences between the two viewpoints in the asymmetric settings allow us to verify their correctness. Our analysis shows that magnetic field lines move with the magnet.
Peer Review Status:Awaiting Review
Subjects: Physics >> Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics submitted time 2019-05-08
Abstract： Based on the fact that the magnetic lines of force can only form continuous closed loops, it is first proved, via the calculation of Lorentz force, that both the N and M hypotheses can successfully explain most representative and impactful unipolar induction experiments dating back to the time of Faraday. Moreover, a simple yet efficient method is outlined, based on the equivalent circuit representation, to derive a generalized formulation of the induced emf in the unipolar induction experiment. The formulation indicates that the crux of the paradox lies in the axial symmetric distribution of the magnetic field generated by the unipolar structure, which is time invariant as the magnet rotates arounDemystifying Unipolar Induction via An Experimental Study on Multipolar Inductiond with a constant angular velocity. Such observation further infers that unipolar induction experiments along cannot effectively address the unipolar induction problem. Accordingly, a multipolar induction experiment is proposed, together with detailed description of the experiment results and comprehensive analysis based on both the N and M hypotheses respectively. The analysis indicates that the induced emf is generated by the static part of the circuit outside the magnet, which is in line with the M hypothesis.
Peer Review Status:Awaiting Review
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