Question

Define retentivity and coercivity.

Answer 1

Hello there!!

♦ RETENTIVITY :
The magnetic field remaining in the material even after removing the external source is known as RETENTIVITY.
It tells us about magnetic strength of material.

♦ COERCIVITY :
The minimum value of magnetising intensity required to bring the material in its original state i.e. 0 magnetic field , is called COERCIVITY.
It tells us about the ability of material to not get affected by the stray magnetic fields.

HOPE IT HELPS YOU DEAR ....

Answer 2

Hey there !!!!!

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`

Retentivity : The property by virtue of which magnetism remains in material even after removing magnetising field is called "Retentivity".

Coercivity : The process of demagnetising a material completely by applying magnetising field in opposite direction is defined as "Coercivity".
The hardness and softness of magnetic material is assessed by its coercivity.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Hope this helped you.........