Explain the phenomenon of hysteresis in magnetic material
Answers
Explanation:
Hysteresis:
The word hysteresis means delayed .
The phenomenon of the lagging of magnetic induction behind the magnetising field is called hysteresis.
Some following point related to Hysteresis:
1. The intensity of magnetisation ( I ) of ferromagnetic substance versus to magnetic intensity ( H ) for complete cycle of magnetisation and demagnetisation is called Hysteresis loop . ( Shown in Attachment ).
2. The intensity of magnetisation field ( H ) is increase , the intensity of magnetisation also increase.
Because more and more domain aligned in the direction of applied force.
3. When Intensity of magnetising field ( H ) is decrease then intensity of magnetisation also decrease.
4. If reverse magnetising field is increased further the material becomes saturated.Now if the magnetising field is reduced after attaining the reverse saturation the cycle repeats itself .
5. The area enclosed by the loop represent loss of energy during a cycle of magnetization and demagnetization .
6. The unit of area of I- H loop is A^2 / m^2.
7. The unit area of BH loop is = mew not ( U ) × unit area of I-H loop.
8. The area under B-H loop is equal to the energy loss per cycle per unit volume.
Thank you
Answer:
Magnetic hysteresis 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.