The area enclosed by the B-H hysteresis loop of a ferromagnetic material represents:
Options

Question

The area enclosed by the B-H hysteresis loop of a ferromagnetic material represents:

G1 Physics · Accepted Answer

During a complete cycle of magnetisation, the magnetic state lags behind the applied magnetising field. This phenomenon is hysteresis. The energy lost per unit volume in one complete cycle is represented by the area enclosed by the hysteresis loop. This energy is mainly dissipated as heat. Therefore option B is correct.