Question

explain hysteresis residual value and coercivity

Answer 1

In other words, it is a material's ability to retain a certain amount ofresidual magnetic field when the magnetizing force is removed after achieving saturation. (The value of B at point b on the hysteresiscurve.)

Answer 2

$\underline{\bold{Hysteresis}}$

The property of ferromagnetic substances by virtue of which intensity of magnetization lags to external field is called as hysteresis.

It is the property of ferromagnetic substance only.


$\underline{\bold{Residual\: value}}$

The intensity of magnetization returned by the ferromagnetic sample even after reducing the applied field to zero is called as retentivity or residual value.


$\underline{\bold{Coercivity}}$

The value of revised magnetic field that is required to reduce the residual value to zero is called as coercivity.