Question

hystersis and retentivity​

Answer 1

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$\bold{1)\:Hystersis:-}$


Hysteresis is the phenomenon due to which,

The external magnetic field that induces a magnetic field in a magnetic material like iron,

Will not completely vanish when the external magnetic field is removed.


$\bold{2)\:Retentivity:-}$

The value of the intensity of the magnetisation of a material..

When,

The magnetising field is reduced to zero is called retentivity.


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Answer 2

HEY MATE......

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HYSTERSIS::

the phenomenon in which the value of a physical property lags behind changes in the effect causing it, as for instance when magnetic induction lags behind the magnetizing force.

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RETENTIVITY:

the ability of a substance to retain or resist magnetization, frequently measured as the strength of the magnetic field that remains in a sample after removal of an inducing field.

"iron is easily magnetized but has low retentivity"..

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