How bullet train and circuit breaker work on the magnetic effect of current?

Bullet trains

      Bullet trains are also called Maglev trains, as they work with the help of powerful electromagnets which make them high speed trains, electromagnets are attached to the metal lining of track,large magnets are present inside the train they work on the principal that like poles repel and unlike poles attract.

Circuit breakers

       it is a device which cuts the power when when there is too much current flowing through the circuits,they are also called fuses, they work with the help of electromagnet to cut the circuit and rejoin.

Explanation: