Demos: 6B-19 Lorentz’s Train
This demonstration uses 6 circular magnets, AA battery and a wound conducting coil. Three magnets are attached to each end of the battery so that their poles will align oppose of each other. Place the device inside the coil and give it a gentle push. The “train” will propel itself through loop and exit at the opposite end. The train works on the principle that when the magnets come in contact with the coil, because of the electric potential of the battery, an electric current is produced. This electric current in turn causes a magnetic field. This magnetic field working in conjunction with the magnetic field of the magnets will exert a force on the train and propel it through the loop.