Question

where we use permanent magnet​

Answer 1

Explanation:

Alnico magnets are used in radar and telephones. They even play an important role in amplifiers and loudspeakers. Ceramic magnets are great for performing attraction and repulsion experiments. Permanent magnets 're used in refrigerators, headphones, speakers, hard disk and many more.

Answer 2

Answer:

A permanent magnet is a ferromagnetic material that possesses permanent magnetic properties, even when it is not located within a magnetic field. One end of the magnet is called the north pole, the other the south pole. ... In certain circumstances a permanent magnet can lose its magnetic properties.