GEOLOGY

Detailed explanation-1: -Three types of Permanent (Bar) Magnets are Ceramic Magnet, Flexible magnets, Neodymium iron boron magnet, and Samarium cobalt magnet.

Detailed explanation-2: -Magnets used in refrigerators, speakers, fridge and magnetic compass are some familiar examples of a permanent magnet.

Detailed explanation-3: -The five types of permanent magnets are alnico, samarium cobalt, ferrite, flexible rubber and the strongest permanent magnets, neodymium magnets.

Detailed explanation-4: -Permanent magnets are manufactured with four main types of materials: ceramic, alnico, samarium cobalt, and neodymium iron boron.

Detailed explanation-5: -Permanent magnets are made from special alloys (ferromagnetic materials) such as iron, nickel and cobalt, several alloys of rare-earth metals and minerals such as lodestone.