Explain hysteris is curve by describing experiment to study the effect of extern N magnetic field on ferromagnetic substances...!
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People also askWhat is magnetic hysteresis and hysteresis curve explain it?A magnetic hysteresis, otherwise known as a hysteresis loop, is a representation of the magnetizing force (H) versus the magnetic flux density (B) of a ferromagnetic material. The curvature of the hysteresis is characteristic of the type of material being observed and can vary in size and shape (i.e. narrow or wide.
Answer:
Hysteresis: The phenomenon in which the magnetic induction (
B
) lags behind with respect to the magnetizing field
H
is called hysteresis.
It 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.
Retentivity: The property of the magnetic material to retain magnetism even in the absence of the magnetizing field is known as retentivity or remanence.
Coercivity: The magnetizing field (H) needed to demagnetize the magnetic material completely is known as its coercivity.
