Jumping Ring

The exhibit exhibits the phenomenon of aluminum rings jumping by inducing a magnetic field through an electrified coil, vividly demonstrating Lenz's law to visitors.

Interaction type: Electromechanical, hands-on. The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

The exhibit is divided into two parts. The first part demonstrates the instantaneous explosive force of DC high voltage. When powered on, the coil generates a magnetic field. As the aluminum ring is equivalent to a closed circuit, the aluminum ring generates induced current, forming a magnetic field. At this time, the magnetic field is opposite to the magnetic field of the aluminum ring, producing a force that makes the aluminum ring jump and hit the top copper gong. The second part achieves different jumping heights by adjusting the current parameters.