How they work
What is a magnetic field?
It is a region around a magnetic material or a moving electric charge within which the force of magnetism acts.
Magnet use 1
A magnet can be used to pick up metal and other objects from a dump so that it doesn't get put in with the other stuff.
Magnet use 2
You can use a magnet to pick up metal objects that fall into tight places that you can't reach with your hands.
Magnet use 3
Clean up metal nails that have fallen in the grass.