GEOLOGY

Detailed explanation-1: -Magnets used in refrigerators, speakers, fridge and magnetic compass are some familiar examples of a permanent magnet.

Detailed explanation-2: -Similarly, refrigerator magnets are made of a material that is permanently magnetized – they don’t use an electric current to generate a magnetic field.

Detailed explanation-3: -A permanent magnet is one that retains its magnetic properties for a long period of time. Examples are iron, nickel, cobalt and some rare earth alloys etc. Temporary magnets are those that simply act like permanent magnets when they are within a strong magnetic field.

Detailed explanation-4: -Examples of permanent magnets include refrigerator magnets, magnets found in compasses, and so on. They are permanent in the sense that once they are magnetized they hold that level of magnetism.

Detailed explanation-5: -Refrigerator magnets can be made from rubber, PVC, polyresin, metal, porcelain, epoxy, or a mixture of some of these materials.