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
Paramagnetic alpha iron changes to gamma iron at
A 770°C
B 912°C
C 1440°C
D 1539°C
Ferromagnetic alpha iron exists in temperature range of
A Below 723°C
B 770 to 910°C
C 910 to 1440°C
D 1400 to 1539°C
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 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
Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic?
A CO2
B O2
C NO
D NO2
Which is the strongest paramagnetic gas?
A CO2
B O2
C NO
D NO2
নিচের কোনটি প্যারাচৌম্বক পদার্থ (Paramagnetic Substance) ?
A Na
B Fe
C He
D H2O
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

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