Question

Which of the following statements is incorrect about hysteresis?

• A. This effect is common to all ferromagnetic substances.
• B. The hysteresis loop area is proportional to the thermal energy developed per unit volume of the material.
• C. The hysteresis loop area is independent of the thermal energy developed per unit volume of the material.
• D. The shape of the hysteresis loop is characteristic of the material.

Answer 1

Answer: (C)

The energy lost per unit volume of a substance in a complete cycle of magnetisation is equal to the area of the hysteresis loop.