Solid State Physics (GATE (Graduate Aptitude Test in Engineering) Physics): Questions 5 - 8 of 68

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Question number: 5

» Solid State Physics » Diffraction Methods for Structure Determination

Appeared in Year: 2014

Short Answer Question▾

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Neutrons moving with speed are used for the determination of crystal structure. If the Bragg angle for the first order diffraction is , the interplanar spacing of the crystal is .

(Given: )

Question number: 6

» Solid State Physics » Bonding in Solids

Appeared in Year: 2014

MCQ▾

Question

The Miller indices of a plane passing through the three points having coordinates are –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 7

» Solid State Physics » Mobility and Effective Mass

Appeared in Year: 2016

Short Answer Question▾

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The energy vs wave vector relationship near the bottom of a band for a solid can be approximation as , where the lattice constant . The values of and are and , respectively. At the bottom of the conduction band, the ratio of the effective mass of the electron to the mass of fee electron is . (Give your answer up to two decimal placed)

(Take mass of free electron )

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: 8 (1 of 2 Based on Passage) Show Passage

» Solid State Physics » Elements of Crystallography

Appeared in Year: 2012

MCQ▾

Question

The group velocity at the boundary of the first Brillouin zone is –

Choices

Choice (4) Response

a.

b.

1

c.

d.

0

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