Question

Distinguish between a permanent magnet
and a temporary magnet. Mention two uses
of each​

Answer 1

Answer:

Permanent Magnets

Permanent magnets differ from temporary magnets by their ability to remain magnetized without the influence of a nearby external magnetic field. Typically, permanent magnets are made from "hard" magnetic materials where "hard" refers to a material's ability to become magnetized and remain magnetized. Steel is an example of a hard magnetic material.

Many permanent magnets are created by exposing the magnetic material to a very strong external magnetic field. Once the external magnetic field is removed, the treated magnetic material is now converted into a permanent magnet.

Temporary Magnets

Unlike permanent magnets, temporary magnets cannot remain magnetized on their own. Soft magnetic materials like iron and nickel will not attract paper clips after a strong external magnetic field has been removed.

One example of an industrial temporary magnet is an electromagnet used to move scrap metal in a salvage yard. An electric current flowing through a coil that surrounds an iron plate induces a magnetic field that magnetizes the plate. When the current flows, the plate picks up scrap metal. When the current stops, the plate releases the scrap metal.

Answer 2

Answer:

Permanent magnet: A magnet whose magnetism is not lost over due course of time is called a permanent magnet.

It is naturally magnetic in nature.

Example: Lodestone.

Temporary magnet: A magnet whose magnetism is lost when the cause for magnetism is switched off, is called a temporary magnet.

It is an artificially made magnet. The magnetism is induced by electric field (current) or another