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CBSE Class 12-science Answered

Explain the phenomenon hystersis....
Asked by shrijeet | 08 Jan, 2013, 10:06: PM
answered-by-expert Expert Answer
Hysteresis occurs in ferromagnetic  materials and ferroelectric  materials, as well as in the deformation of some materials in response to a varying force.
In natural systems hysteresis is often associated with irreversible thermodynamic change.
 
 
When a ferromagnetic material is magnetized in one direction, it will not relax back to zero magnetization when the imposed magnetizing field is removed. It must be driven back to zero by a field in the opposite direction. If an alternating magnetic field is applied to the material, its magnetization will trace out a loop called a hysteresis loop.
Answered by | 09 Jan, 2013, 12:40: PM
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