Solid State PhysicsElements of Crystallography (GATE Physics): Questions 1  5 of 5
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Question number: 1
» Solid State Physics » Elements of Crystallography
Appeared in Year: 2015
Write in Short
The lattice parameters of an orthorhombic crystal are related by . In units of , the interplanar separation between the planes is ________ (up to three decimal places)
Passage
The dispersion relation for a one – dimensional monatomic crystal with lattice spacing a, which interacts via nearest neighbor harmonic potential is given by, , where is a constant of appropriate unit.
Question number: 2 (1 of 2 Based on Passage) Show Passage
» Solid State Physics » Elements of Crystallography
Appeared in Year: 2012
Question
The group velocity at the boundary of the first Brillouin zone is –
Choices
Choice (4)  Response  

a. 


b.  1 

c. 


d.  0 

Question number: 3 (2 of 2 Based on Passage) Show Passage
» Solid State Physics » Elements of Crystallography
Appeared in Year: 2012
Question
The force constant between the nearest neighbors of the lattice is –
(M is the mass of the atom)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 4
» Solid State Physics » Elements of Crystallography
Appeared in Year: 2013
Question
A lattice has the following primitive vectors : . The reciprocal lattice corresponding to the above lattice is –
Choices
Choice (4)  Response  

a.  BCC lattice with cube edge of 

b.  FCC lattice with cube edge of 

c.  BCC lattice with cube edge of 

d.  FCC lattice with cube edge of 

Question number: 5
» Solid State Physics » Elements of Crystallography
Appeared in Year: 2008
Question
The lattice specific heat of a crystalline solid can be obtained using the Dulong Petit model, Einstein model and Debye model. At low temperature ; Which one of the following statement is true ( and are constant) –
Choices
Choice (4)  Response  

a.  Dulong Petit: ; Einstein: ; Debye: 

b.  Dulong Petit: ; Einstein ; Debye: 

c.  Dulong Petit: ; Einstein ; Debye: 

d.  Dulong Petit: ; Einstein ; Debye: 
