Related Questions

Heating of ferromagnetic materials to a temperature above Curie temperature makes it
A Insulator for heat & electricity transmission
B Ferritic
C Behave like paramagnetic materials
D Superconductor
The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is
A 770°C
B 910°C
C 1050°C
D Below recrystallization temperature
The temperature at which ferromagnetic material can no longer be magnetised by the outside forces, is termed as the
A Critical point
B Curie temperature
C Inversion temperature
D Eutectic temperature
The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as
A Rigid
B Tough
C Ductile
D Plastic
Paramagnetic materials have relative permeability
A slightly less than unity
B equal to unity
C slightly more than unity
D equal to that ferromagnetic mate rials
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
A magnetic material becomes __________ above the Curie temperature.
A Ferromagnetic
B Diamagnetic
C Paramagnetic
D None of these
Which of the following properties is found only in ferromagnetic materials ?
A Susceptibility independent of temperature
B Point in a particular direction
C Hysteresis
D Attracting a magnetic substance
Spontaneous magnetisation is characteristic of ferromagnetic materials.
A True
B False
Curie point is the temperature at which
A Matter becomes radioactive
B A metal loses magnetic properties.
C A metal loses conductivity
D Transmutation of metal occurs.

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