Physics - Magnetism Question with Solution | TestHub

The curve of B against H for a ferromagnetic material is called hysteresis loop

The area of B-H curve is a measure of power dissipated per cycle per unit, area of the specimen

Coercitivity is a measure of the magnetic field required to destory the residual magnetism of ferromagnetic material

The retentivity of a speciment is the measure of magnetic field remaining in the speciment when the magnetising field is removed