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    Nowadays, Maglev trains are quirt common, many country have there own Maglev system, all of them are using the phenomenon of magnetic levitation to lift up the train, and the zero electricity resistance property of the superconductor to make a powerful electric magnet.

    I got a question here.

    Instead of using the magnetic levitation phenomenon to lift up the train, why don't people use the levitation phenomenon of a superconductors to lift up the train? Surely, using superconductors levitation phenomenon to lift a train would be much more efficient. Magnetic levitation need a pair of strong electric magnet to lift up the train, superconductors levitation only need one, it would be greatly reduce the electricity and also the price for drive the Maglev train.

    Why don't people build a superconductors train, is that any technique we missing for building a train with a lift up force produced by superconductors levitation phenomenon???

    Because superconductors are highly expensive, and as such, are mainly utilised for smaller applications, as it stands. Even wind turbines don't use them. But yes, in the future, superconductors may be used for this. I can't speak on pairs vs single magnets, I'm not a physicist.

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