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Ferromagnetism

Draw the vari...

Question

Draw the variation of magnetic field (B) with magnetic intensity (H) when a ferromagnetic material is subjected to a cycle of magnetisation.

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Solution

A well labelled graph has been drawn.

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Similar questions

Q. A magnetising field intensity of

1000 \frac{A}{m}

produces magnetic flux density

0.25 \frac{W b}{m^{2}}

in a ferromagnetic substance. The relative permeability of ferromagnetic substance is )(Approximately)

Q. Answer the following questions:
(a) Why does a paramagnetic sample display greater magnetisation (for the same magnetising field) when cooled?
(b) Why is diamagnetism, in contrast, almost independent of temperature?
(c) If a toroid uses bismuth for its core, will the field in the core be (slightly) greater or (slightly) less than when the core is empty?
(d) Is the permeability of a ferromagnetic material independent of the magnetic field? If not, is it more for lower or higher fields?
(e) Magnetic field lines are always nearly normal to the surface of a ferromagnet at every point. (This fact is analogous to the static electric field lines being normal to the surface of a conductor at every point.) Why?
(f) Would the maximum possible magnetisation of a paramagnetic sample be of the same order of magnitude as the magnetisation of a ferromagnet?

Q. Distinguish between diamagnetic and ferromagnetic substances in respect of (i) Intensity of Magnetisation, (ii) behaviour in a non-uniform magnetic field and (iii) suspectibility.

Q. For a magnetic material graph between intensity of magnetisation

(\to I)

and magnetic intensity

(\to H)

is as shown in diagram
Then material is

Q. Which of the following pairs has quantities of the same dimensions?
(a) Magnetic field B and magnetising field intensity H
(b) Magnetic field B and intensity of magnetisation I
(c) Magnetising field intensity H and intensity of magnetisation I
(d) Longitudinal strain and magnetic susceptibility

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