CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

What is hysteresis? Define the terms 'coercivity' and 'retentivity' of a ferromagnetic material.

Open in App
Solution

Hysteresis: The phenomenon in which the magnetic induction (B) lags behind with respect to the magnetizing field H is called hysteresis.
It occurs when an external magnetic field is applied to a ferromagnet such as iron and the atomic dipoles align themselves with it. Even when the field is removed, part of the alignment will be retained: the material has become magnetized. Once magnetized, the magnet will stay magnetized indefinitely.
Retentivity: The property of the magnetic material to retain magnetism even in the absence of the magnetizing field is known as retentivity or remanence.

Coercivity: The magnetizing field (H) needed to demagnetize the magnetic material completely is known as its coercivity.

874557_946844_ans_5150fb6e75784ddf9e2620cf3fd38cbd.JPG

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Hysteresis
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon