How the horseshoe magnet field lines look like?
The poles of the horseshoe magnet are on the end face of the magnet, one pole is N and the other pole is S. When you use one pole of a square magnet to approach the two ends of the horseshoe magnet, you will find that one end will attract the square magnet and the other end will repel. The magnetic field lines of the horseshoe magnet are shown in the figure. The denser the magnetic field lines, the stronger the magnetic field.
Why do horseshoe magnet need an iron piece to attract the poles when it is not in use?
After the horseshoe magnet is magnetized, it usually attracts an iron piece at both ends of the magnetic pole. This iron piece is actually a magnetic keeper. Since the horseshoe magnet is made of AlNiCo alloy, which has low coercivity and is easy to demagnetize. When not in use, the magnetic retention sheet is attracted to the magnet, and most of the magnetic lines of force will be concentrated in the iron sheet, which will reduce the external interference to the magnet such as temperature changes, vibration, etc., and is not easy to demagnetize.
What are some uses of horseshoe magnets?
Horseshoe magnet can be used to pick up metal objects of any size depending on the strength of the horseshoe magnet. For example, small horseshoes can collect paper clips, while industrial-sized horseshoe magnets are used in construction and engineering to pick up large pieces of heavy metal. Horseshoe magnets are also used at the bottom of pendulums.
With high temperature resistance and corrosion resistance, AlNiCo horseshoe magnet is usually used to fix circuits and pipelines in high temperature, high humidity or high salt environment.