Question

Why is pure iron not used for making

permanent magnets? Name one

material used for making permanent

magnets. Describe how permanent

magnets are made electrically. State

two examples of electrical instruments

made by using permanent magnets. (doubt)​

Answer 1

• It is not used because the retentivity of pure iron, i.e the abillity to retain the magnetic field induced.

an alloy of alluminium and iron is used for making pernmanet magnets

they are used in small motors and some watches. Pure iron is soft

Ordinary bar magnets are made of Iron, usually relatively soft Iron. The metals in Alnico magnets are indicated by the pairs of letters making up the name, Aluminum, Nickel and Cobalt. Nickel and Cobalt are the ferromagnetic materials.

This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels othermagnets.

Answer 2

pure iron loses its magnetism as soon as the current is removed whereas steel doesn't do so . Steel can be made a permanent magnet by passing electricity through a wire in the form of loops.
two examples:1 . Electric motor
2 . Electronic Doors