Question

$\huge{{\underline{\mathbb{\red{Question~☞}}}}}$
explain the magnetic hysteresis curve.
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Answer 1

Answer:

Magnetic hysteresis occurs when an external magnetic field is applied to a ferromagnet such as iron and the atomic dipoles align themselves with it. Even when the field is removed, part of the alignment will be retained: the material has become magnetized. Once magnetized, the magnet will stay magnetized indefinitely. To demagnetize it requires heat or a magnetic field in the opposite direction. This is the effect that provides the element of memory in a hard disk drive.

Answer 2

Magnetic hysteresis occurs when an external magnetic field is applied to a ferromagnet such as iron and the atomic dipoles align themselves with it. ... If a magnet is demagnetized ( H=M=0 ) and the relationship between H and M is plotted for increasing levels of field strength, M follows the initial magnetization curve.

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