Question

maglev trains use magnets on the train and guideway to levitate the train off the track. the north pole of the magnets on the train must face the
o south pole of the magnets on the guideway so they repel.
o south pole of the magnets on the guideway so they attract.
o north pole of the magnets on the guideway so they repel.
o north pole of the magnets on the guideway so they attract.

Explanation:

Maglev trains levitate using magnetic repulsion. Like poles of magnets repel each other (north - north or south - south), and opposite poles attract. To levitate the train off the track, the magnets on the train and guideway must repel. So the north pole of the train's magnet should face the north pole of the guideway's magnet (since like poles repel) or the south pole of the train's magnet should face the south pole of the guideway's magnet. Among the options, the one that fits is "north pole of the magnets on the guideway so they repel" because like poles repel, which is needed for levitation.

Answer:

C. north pole of the magnets on the guideway so they repel.