Are keepers magnetic or non-magnetic materials?

Ferromagnetic material and non-magnetic material

Why cannot we make permanent magnets from paramagnetic materials?

All metals are magnetic materials.

How will you show that magnetic force can pass through non-magnetic materials?

State how magnetic susceptibility is different for the three types of magnetic materials, i.e., diamagnetic, paramagnetic and ferromagnetic materials.

Assertion" When diamagnetic material is placed in a non-uniform magnetic Held, it tends to move from stronger to the weaker part of the magnetic field. Reason: Diamagnetic materials possess strong magnetism.

Assertion: Above Curie temperature, a frerromagnetic material becomes paramagnetic. Reason: When a magnetic material is heated to very high temperature, it loses its magnetic properties.

The method used to make a magnet in which a magnetic material is placed on a flat surface and stroked along its length

(i) Write two characteristics of a material used for making permanaent magnets. (ii) Why is core of an electromagnet made of ferromagnetic materials ?

Magnetic force can pass through non-magnetic materials.