Related Questions

The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ °C.
A 768
B 1127
C 1359
D 1480
The relative permeability of materials is not constant.
A diamagnetic
B paramagnetic
C ferromagnetic
D insulating
Substances which have permeability less than the permeability of free space are known as
A Ferromagnetic
B Paramagnetic
C Diamagnetic
D Bipolar
The susceptibility of paramagnetic materials generally lies between
A 10-3 and 10-5
B 10-3 and 10-7
C 10-4 and 10-8
D 10-2 and 10-5
Relative permeability of vacuum is
A 1
B 1 H/m
C $$4\pi \times {10^{ - 7}}$$
D $$\frac{1}{4}$$
Superconducting metal in super conducting state has relative permeability of
A Zero
B One
C Negative
D More than one
The relative permeability of a ferromagnetic material is
A Less than one
B More than one
C More than 10
D More than 100 or 1000
The relative permeability is less than unity is case of
A ferromagnetic materials
B ferrites
C non-ferrous materials
D diamagnetic materials
The unit of relative permeability is
A henry/metre
B henry
C henry/sq. m
D it is dimensionless
Which one of the following kinds of materials has the lowest permeability?
A A diamagnetic material
B A paramagnetic material
C A feiTomagnetic material
D All of the above
E None of the above

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