Question

differentiate between temporary and permanent magnets

Answer 1

Types of Temporary Magnets. Temporary magnets are made from soft metals, and only retain their magnetism while near a permanent magnetic field or electronic current. Common temporary magnets include nails and paperclips, which can be picked up or moved by a strong magnet.
Magnets which possess higher retentivity and coercivity and retain the magnetic field for longer period are called permanent magnets. Example. Alnico, Nipermag, Steel.
The difference between a permanent magnet and a temporary magnet is in their atomic structures... Temporary magnets have their atoms aligned only while under the influence of a strong external magnetic field. Overheating apermanent magnet will rearrange its atomic structure and turn it into atemporary magnet..