GEOLOGY

Detailed explanation-1: -Answer : Temporary magnets are made out of soft metals that retain their magnetism only when they are near a permanent magnetic field or an electrical current. In the presence of a magnetic field, they become magnetised. Paperclips, iron nails, and other similar things are examples of temporary magnets.

Detailed explanation-2: -Iron filings are attracted to the magnetized iron nail. However, do take note that the iron nail is only a temporary magnet. If you leave the magnetised iron nail around for a few days, it will very likely lose its magnetism.

Detailed explanation-3: -A bar magnet is an example of a permanent magnet since its magnetism cannot be switched on and off. A temporary (or induced) magnet can only be magnetised temporarily. Temporary magnets only become magnetic when placed in a magnetic field and will quickly lose its magnetism when removed from the magnetic field.

Detailed explanation-4: -An electromagnet is a temporary magnet made by winding a coil of wire around a piece of soft iron.

Detailed explanation-5: -Bringing a ferromagnetic object, like a nail, into the magnetic field of a strong magnet can cause the molecules of the iron material to line up and the nail to become a temporary magnet. As long as it is in the magnetic field of the bar magnet, the nail acts like a magnet and picks up other ferromagnetic materials.