In the hysteresis curve the value of magnetization (B) which will be present in a substance when value of…
In the hysteresis curve the value of magnetization (B) which will be present in a substance when value of magnetizing force $(\mathrm{H})$ is made zero $(\mathrm{H}=0)$ is called as
coercivity
retentivity
domain
saturation
Solution
Retentivity or remanence is the ability of a magnetic substance to retain magnetism even in the absence of a magnetising field.
$\therefore \quad$ Retentivity corresponds to the value of $\mathrm{B}$ when value of $\mathrm{H}$ is zero.