A) The curve og B against H for a ferromagnetic material is called hysteresis loop
B) The area of B-H curve is a measure power dissipated per cycle per unit area of the specimen
C) Coercitivity is a measure of the magnetic field required to destroy the residual magnetism of ferromagnetic material
D) The retentivity of a specimen is the measure of magnetic field remaining in the specimen when the magnetising field is removed
