Related Questions

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
Device used for the detection and measurement of all types of radiation (alpha, beta and gamma)
A Geiger counter
B Polarimeter
C Calorimeter
D Radiometer
Gamma iron exits at following temperature
A Room temperature
B Near melting point
C Between 1400°C and 1539°C
D Between 910°C and 1400°C
Gamma-iron occurs between the temperature ranges of
A 400°C to 600°C
B 600°C to 900°C
C 900°C to 1400°C
D 1400°C to 1530°C
The crystal structure of gamma iron is
A Body centered cubic
B Face centered cubic
C Hexagonal close packed
D Cubic structure
The type of space lattice found in gamma-iron is
A Face centered cubic space lattice
B Body centered cubic space lattice
C Close packed hexagonal space lattice
D None of these
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
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

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