If the magnetizing field on a ferromagnetic material is increased, its permeability
May be increased or decreased
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The magnetic permeability of a substance is defined as
where B is the established magnetic field inside the material,
H is the applied external magnetic field.
When the external applied magnetic field H is increased, the established magnetic field for a ferromagnetic material remains the same. Thus the magnetic permeability decreases.
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A soft ferromagnetic material is placed in an external magnetic field. The magnetic domains:
A ferromagnetic material is placed in an external magnetic field. The magnetic domains in it,
When temperature of a ferromagnetic material is decreased to 80%, what is the percentage change in its magnetic susceptibility?
A paramagnetic material is kept in a magnetic field. The field is increased till the magnetisation becomes constant. If the temperature is now decreased, the magnetisation
(a) will increase
(b) will decrease
(c) will remain constant
(d) may increase or decrease
A paramagnetic material is placed in a magnetic field. Consider the following statements:
(A) If the magnetic field is increased, the magnetisation is increased.
(B) If the temperature is increased, the magnetisation is increased.
(a) A and B are true.
(b) A is true but B is false.
(c) B is true but A is false.
(d) A and B are false.