Jumping Ring

1. Content

The nearly 2-meter straight rod standing in mid air effectively attracts the attention of visitors. The exhibition items creatively use electromechanical and multimedia interactive methods, allowing viewers to operate them themselves and deepen their understanding of electromagnetic induction phenomena.

A cylinder is set up on the booth, which can be connected to AC and DC electricity. The cylinder is covered with an aluminum ring, and a lightweight coil is attached to the aluminum ring to form a closed circuit. When participating, the audience changes the voltage level through the multimedia display screen. Depending on the voltage level, the height and state of the aluminum ring jumping will also vary.

In exhibitions, when a coil with an extremely large number of turns passes through a strong current instantly, a sudden magnetic field change will be generated. The aluminum ring placed above the coil will also generate a strong induced electromotive force, as the aluminum ring is a closed conductor, it generates a strong current and a strong magnetic field. Due to the repulsion between this magnetic field and the magnetic field generated by the coil, the aluminum ring will jump high.

2. Principle

Electromagnetic induction phenomenon refers to the generation of electromotive force by a conductor placed in a changing magnetic flux. This electromotive force is called induced electromotive force or induced electromotive force. If this conductor is closed in a loop, the electromotive force will drive electrons to flow, forming induced current (induced current). Michael Faraday is generally believed to have discovered electromagnetic induction in 1831, although Francesco Zantedeschi's work in 1829 may have foreseen this.

Electromagnetic induction refers to the phenomenon of inducing electromotive force due to changes in magnetic flux. The discovery of electromagnetic induction phenomenon is one of the greatest achievements in the field of electromagnetics. It not only reveals the intrinsic connection between electricity and magnetism, but also lays the experimental foundation for the mutual conversion between electricity and magnetism, opening up the way for humans to obtain huge and cheap electricity, which has significant practical significance. The discovery of electromagnetic induction phenomenon marks the arrival of a major industrial and technological revolution. It has been proven that the widespread application of electromagnetic induction in electrical engineering, electronic technology, electrification, and automation has played an important role in promoting social productivity and the development of science and technology.

The phenomenon of electromagnetic induction is one of the most significant discoveries in electromagnetics, revealing the interconnection between electrical and magnetic phenomena. The significance of Faraday's law of electromagnetic induction lies in that, on the one hand, based on the principle of electromagnetic induction, people have created generators, making large-scale production and long-distance transmission of electrical energy possible; On the other hand, the phenomenon of electromagnetic induction has a wide range of applications in electrical technology, electronic technology, and electromagnetic measurement. From then on, human society entered the era of electrification.

3. Purpose

The exhibition items creatively adopt electromechanical and multimedia interactive methods, allowing the audience to operate them themselves and deepen their understanding of electromagnetic induction phenomena.