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The Invisible Force

Electromagnetism

★Exhibit Content: Lenz's Law ★Interaction: Electromechanical Interaction ★Operation: Press the "Start" button and observe the movement of the aluminum ring on the metal rod. ★Exhibit Description: Through electromechanical interaction, this exhibit allows visitors to operate it themselves, deepening participants' understanding of electromagnetic induction. The main body of the exhibit consists of a circular platform, start button, coil, metal rod, aluminum ring, acrylic cover, etc. The aluminum ring is fitted on the cylinder and has a lightweight coil attached, forming a closed circuit. When the visitor presses the start button, current is generated. When a coil with many turns momentarily passes a strong current, it produces a sudden magnetic field change, and the aluminum ring placed above the coil also generates a strong induced electromotive force. Because the aluminum ring is a closed conductor, a strong current is generated, which in turn produces a strong magnetic field. Since this magnetic field repels the magnetic field generated by the coil, the aluminum ring jumps up high. ★Scientific Principle: At the moment the button is pressed, when the coil momentarily passes a strong current, it produces a sudden magnetic field change, and the aluminum ring placed above the coil also generates a strong induced electromotive force. Because the aluminum ring is a closed conductor, a strong current is generated, which in turn produces a strong magnetic field. Since this magnetic field repels the magnetic field generated by the coil, the aluminum ring jumps up high. The greater the coil current or the faster the current changes, and the smaller the resistance of the aluminum ring, the greater the repulsive force between them.

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Review

Principle Display: ★★★★ Interaction Effect: ★★★ Ease of Installation: ★★★★★ Durability: ★★★★ Overall Rating: ★★★★

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