8.6 Uses of Permanent Magnets
There are many uses of permanent magnets, such as:
- They are essential parts of D.C. motors, A.C. and D.C. electric generators.
- Permanent magnets are used in moving-coil loudspeakers.
- They are very commonly used in door catchers.
- Magnetic strips are fitted to the doors of refrigerators and freezers to keep the doors closed tightly.
- They are commonly used to separate iron objects from different mixtures.
- Flour mills use permanent magnets to remove iron nails, etc. from grains before grinding.
- In the medical field, they are used to remove iron splinters from the eyes.
- A piece of permanent magnet is used to reset the iron pointer in a maximum and minimum thermometer.