The mystery of generators: where does electricity come from?

This exhibit showcases the scientific principles of electromagnetic induction to visitors, hoping that they can deeply understand the phenomenon of electromagnetic induction and stimulate their interest in exploring electromagnetics and even the entire field of physics. The exhibit consists of a turntable device, handwheel, base, encoder, and light bulb. The main body includes a rotatable magnet, a set of tightly wound coils (as conductors), and a light bulb connected to the coils through wires. When visitors rotates the magnet, the magnetic field generated by the magnet will cut through the magnetic induction lines of the coil. According to Faraday's law of electromagnetic induction, this action will generate an induced electromotive force in the coil, which in turn drives the generation of current. The generated current is transmitted to the light bulb through wires, causing it to emit light, thus visually demonstrating the process of magnetic electricity generation in the generator. one Before visitors arrives at the exhibit, they manually rotate the magnets on the exhibit (operated through a handwheel or turntable device) Observing the brightness change of the light bulb with the change of magnet speed, feeling.

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.