Similarly, moving a magnet creates an electric current in a neighbouring wire.

ECONOMIST: Recreating the planet's magnetic field in a laboratory

Andrew Kent, a physicist at New York University, spends most days running electricity through a magnet smaller in diameter than a single cell, trying to determine the lowest current at which an electron's spin changes orientation.

FORBES: Magazine Article

As the train's magnets pass over a frame, they induce an electric current in it and this, in turn, generates a magnetic field which repels the magnet that started the whole process and thus levitates the train.

ECONOMIST: Maglev trains

Current designs for maglev trains rely on electromagnets, since nobody has been able to make a permanent magnet strong enough to lift the weight of a train.

ECONOMIST: Maglev trains