Question

Rob is studying for an exam. He listed some properties of magnets in a Maglev train.

Which best explains Rob’s error?

The current in the electromagnet of the guidance magnet does not change.
The types of magnets are listed incorrectly in the table and should be switched.
The unlike poles of the guide way and support magnets face each other.
The repelling of the support magnet decreases friction.

Answer 1

D. The repelling of the support magnet decreases friction.

The magnets are repelling, so they are not directly touching. This allows for decreased friction.