Question

Temporary magnets are often used to sort scrap metal for recycling. For example, electromagnets are often used in this way. Why is it better to use a temporary magnet for this purpose instead of a permanent one?

Answer 1

$\huge\tt{Answer}$

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.