Which of the following statement related to hysteresis loop is...

Which of the following statement related to hysteresis loop is incorrect?

Options

AThe curve of $\mathrm{B}$ against $\mathrm{H}$ for $\mathrm{a}$ ferromagnetic material is called hysteresis loop
BThe area of $B$ - $H$ curve is a measure of power dissipated per cycle per unit area of the specimen
CCoercitivity is a measure of the magnetic field required to destroy the residual magnetism of ferromagnetic material
DThe retentivity of a specimen is the measure of magnetic field remaining in the specimen when the magnetising field is removed

Correct answer

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

Step-by-step solution

The hysteresis loop i.e. area of B-H curve is a measure of energy dissipated per cycle per unit volume of the specimen. It depends on the nature of magnetic material.

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