Write any five properties of ferromagnetic..??...
Answers
Explanation:
1) .The atoms of ferromagnetic substances have permanent dipole moment present in domains.
2.) Atomic dipoles in ferromagnetic substances are oriented in the same direction as the external magnetic field.
3). The magnetic dipole moment is large and is in the direction of the magnetizing field.
4) .The intensity of magnetization (M) is very large and positive and varies linearly with the magnetizing field (H). Hence saturation depends on the nature of the material.
--The magnetic susceptibility is very large and positive. Magnetic susceptibility Xm = M / H, where M is the intensity of magnetization and H is the strength of the applied magnetic field.
5.) The magnetic flux density of the material will be very large and positive. Magnetic field lines become very dense inside ferromagnetic materials. Magnetic flux density B = 0 (H + M), where 0 is the magnetic permittivity of free space, H is the strength of the applied magnetic field and M is the intensity of magnetization.
6.) The relative permeability is also very large and varies linearly with the magnetizing field the field inside the material is much stronger than the magnetizing field. They tend to pull in a large number of lines of force by the material. Relative permeability of material r = 1 + m
7.) Ferromagnetic substances are strongly attracted by the field. So in a nonuniform field, they tend to stick at the poles where the field is strongest.
8.) If a ferromagnetic powder is placed in a watch glass placed on two poles pieces which are sufficient apart then powder accumulates at sides and shows depression in the middle because the field is strongest at poles.
9.) When a ferromagnetic substance is liquefied, it loses ferromagnetic properties due to higher temperature.
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