Trains that use magnets to levitate above the tracks might sound like something from Back to the Future, but the concept of magnetic levitation has been around for many years.
Answers (2)
The train floats atop this magnetic field and is given support and guidance from the interaction that takes place between the magnet and another element on the ground, such as a steel track, a conducting element in the track or another magnet. Elimination of direct mechanical contact they can reach higher speeds.