Electromagnets and the World Today!
Electromagnet and how they affect our world daily.
You may not know it, but they are there!
Your Hard drive
See more info here: http://electromagnets.weebly.com/hard-drives.html
As well as here: https://en.wikipedia.org/wiki/Hard_disk_drive
See for more info here: http://electromagnets.weebly.com/speakers.html
Electric trains (or Maglev trains)
The train is propelled forward by an electromagnetic coil which, at first, pulls the train toward that part of the track, and then quickly switches polarity making the magnet repel the train along the track.