The crystal structure of gamma iron is

Paramagnetic alpha iron changes to gamma iron at

A

770°C

B

912°C

C

1440°C

D

1539°C

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 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

Quartz crystal is most commonly used in crystal oscillators because ___________

A

It has superior electrical properties

B

It is easily available

C

It is quite inexpensive

D

None of the above

The crystal oscillator frequency is very stable due to ___________ of the crystal

A

Rigidity

B

Vibrations

C

Low Q

D

High Q

If the crystal frequency changes with temperature, we say that crystal has ___________ temperature coefficient

A

Positive

B

Zero

C

Negative

D

None of the above

The crystal of alpha iron is

A

Body centered cubic

B

Face centered cubic

C

Hexagonal close packed

D

Cubic structure

γ রশ্মির(Gamma Ray) ভেদন ক্ষমতা X- রশ্মির (X-Ray) থেকে– "

A

কম

B

সমান

C

বেশি

D

নগন্য

Gamma amino butyric acid (GABA)

A

Increases chloride permeability in the neurons

B

Acts on post-synaptic membranes

C

Has its action terminated by reuptake into neurons

D

Is an excitatory transmitter at the CNS

E

Has its action selectively blocked by strychnine

The crystal structure of gamma iron is

Related Questions