Loyola College M.Sc. Physics Nov 2003 Solid State Physics Question Paper PDF Download

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – PHYSICS

THIRD SEMESTER – NOVEMBER 2003

PH 3801 / PH 921 – SOLID STATE PHYSICS

 

05-11-2003                                                                                            Max.   : 100 Marks

1.00 – 4.00

 

PART – A

 

Answer ALL question.                                                                                (10 x 2 = 20)

 

  1. Define the reciprocal lattice vector .

 

  1. What is a Van der Waal’s interaction?

 

  1. Outline the principles involved in the inelastic scattering of neutrons by PHONONS.

 

  1. State the implications of observing harmonic lattice vibrations.

 

  1. What is size effect?
  2. State Mathiessen rule
  3. What is a Fermi sphere?

 

  1. Distinguish between metals and insulators on the basis of energy bands and the number of electrons per primitive cell.

 

  1. State the difference in the paramagnetic behaviour of rare earth and iron group salts.

 

  1. State Curie-Weiss law and its significance.

 

PART – B

Answer any FOUR questions only                                                             (4 x 7.5 = 30)

 

  1. Obtain the dispersion relation for the one dimensional monoatomic lattice and PLOT w  .

 

  1. Discuss how the nearly FREE electron model for a monoatomic lattice of lattice constant ‘a’ establishes origin of energy gap.

 

  1. What are the three different zone schemes for studying Fermi surface? Explain.

 

  1. Describe the three phonon collision process and briefly EXPLAIN its role in causing thermal resistivity.

 

  1. What are Magnons? Show that the fractional change of magnetization is proportional to T3/2.

-2-

 

PART – C

 

Answer any FOUR questions only.                                                          (4 x 12.5 = 50)

 

  1. Obtain the wave equation for an electron in a periodic potential of lattice constant ‘a’. Hence give the proof of Bloch theorem.

 

  1. a) Derive a quantitative expression for the electronic heat capacity of a free electron gas at low temperatures.     (8.5)

 

  1. b) Quantitatively account for the electrical conductivity as a motion of the Fermi sphere.      (4)

 

  1. a) Apply quantum theory to obtain Curie’s law of para magnetism. (8)

 

  1. b) Describe briefly de Haas Van Alphen effect.     (4.5)

 

  1. a) Explain Ferromagnetic domains. (5)

 

  1. b) Establish theoretically the existence of Bloch Wall between domains in a ferromagnet.                                                         (7.5)

 

  1. Write short notes on any TWO of the following

 

  1. DEBYE’S T3-law.
  2. Isoentropic cooling by demagnetization
  • Paulis Spin paramagnetism

 

 

 

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Loyola College M.Sc. Physics April 2015 Solid State Physics Question Paper PDF Download

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Loyola College M.Sc. Physics Nov 2016 Solid State Physics Question Paper PDF Download

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Loyola College B.Sc. Physics April 2009 Solid State Physics Question Paper PDF Download

         LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

XC 24

SIXTH SEMESTER – April 2009

PH 6606 – SOLID STATE PHYSICS

 

 

 

Date & Time: 21/04/2009 / 9:00 – 12:00  Dept. No.                                                     Max. : 100 Marks

 

 

PART A

Answer all questions.  All questions carry equal marks.                           (10 x 2 = 20 marks)

 

  1. Define coordination number.
  2. The lattice constant of a Cubic lattice is a, Calculate spacing between (0, 1, 1) and

(1, 1, 2) planes.

  1. Write Laue equations.
  2. The Bragg’s angle for (2, 2, 0) reflection from Nickel(f c c) is 45˚. when X-rays of

wavelength 1.75Å are employed in a diffraction experiment,.  What is the lattice constant?

  1. Mention any two assumptions of classical theory of specific heat of solids.
  2. State Gruneisen’s law.
  3. What is Hall effect?
  4. What do you understand by density of states?
  5. Distinguish between type I and type II semiconductors.
  6. What is Meissner effect?

 

PART B

Answer any four questions.                                                                         (4 x 7.5 = 30 marks)

 

  1. What are Miller indices? How are they determined?
  2. Write note is on Neutron diffraction.
  3. Debye temperature of carbon(diamond)structure is 1850K. Calculate the molar specific heat

for diamond at 20K.  Also compute the highest lattice frequency involved in the Debye

theory.

  1. Calculate the number of energy states available for the electrons in a cubical box of side 1 cm

lying below an energy of 1 electron volt.

  1. Explain I-V characteristics of d.c Josephson effect.

 

PART C

Answer any four questions.                                                                         (4 x 12.5 = 50 marks)

  1. Classify the seven systems crystal on the basis of 14 bravais lattices. Explain with the help of

the unit cell lattice parameters and giving examples.

  1. With a neat diagram explain the powder method for determining the structure of a crystal.
  2. Work out an expression for the specific heat of solids following Einstein model. Mention its

draw backs.

  1. a) Derive an expression for the Fermi energy of a free electron gas in three dimensions. (8)
  2. b) Estimate the lattice specific heat of sodium (at constant volume) at 20K. The Fermi

temperature of sodium is 3.8 x 104 K and its Debye temperature is 150 K.                   (4.5)

(K = 1.38 x 10-23 J/K)

  1. Outline qualitatively the BCS theory of superconductivity.

 

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Loyola College B.Sc. Physics April 2010 Solid State Physics Question Paper PDF Download

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Loyola College B.Sc. Physics April 2011 Solid State Physics Question Paper PDF Download

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

SIXTH SEMESTER – APRIL 2011

PH 6610/PH 6606 – SOLID STATE PHYSICS

 

 

Date : 07-04-2011              Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART – A

 

Answer all questions. All questions carry equal marks.                               (10×2=20marks) 

 

  1. Define crystal lattice?
  2. What is coordination number?
  3. Write Laue equations.
  4. Why are X-rays used for diffraction studies in crystals?
  5. Give the classical value of specific heat at high temperatures and at T = OK.
  6. What is the basic difference between Einstein’s model and Debye model?
  7. Mention the differences between free electron gas and ordinary gas?
  8. What is Hall effect?
  9. What is Meissner effect?
  10. Explain Type I superconductor.

PART – B

Answer any FOUR questions.                                                                              (4×7.5=30marks)

 

  1. a) What are Miller indices?
  1. b) Calculate the ratio of d100 : d110 : d111 for simple cubic structure.
  1. Write a note on neutron diffraction.
  2. Debye temperature of diamond is 1850 K. Calculate the molar specific heat for diamond at 20 K. Also compute the highest lattice frequency involved in the Debye theory.

(R = 8.4 J.mol– 1.K– 1  ,h = 6.62 X 10– 34 Js kb = 1.38 X 10– 23 J.K– 1 ).

  1. Discuss the variation of density of states with energy for a free electron gas in 3-d.
  2. Explain Josephson effect.

PART – C

Answer any FOUR questions.                                                                   (4×12.5=50marks)

 

  1. Describe three dimensional lattice types with suitable diagrams.
  2. Explain the powder method of X-ray diffraction studies.
  3. Derive an expression for the specific heat of a solid on the basis of Einstein’s theory.
  4. Derive an expression for the paramagnetic susceptibility of a free electron gas.
  1. Explain the occurrence of superconductivity based on BCS theory.

 

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Loyola College B.Sc. Physics April 2011 Solid State Physics Question Paper PDF Download

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

SIXTH SEMESTER – APRIL 2011

PH 6610/PH6606 – SOLID STATE PHYSICS

 

 

 

Date : 07-04-2011              Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

PART – A

 

Answer all questions. All questions carry equal marks.                               (10×2=20marks) 

 

  1. Define crystal lattice?
  2. What is coordination number?
  3. Write Laue equations.
  4. Why are X-rays used for diffraction studies in crystals?
  5. Give the classical value of specific heat at high temperatures and at T = OK.
  6. What is the basic difference between Einstein’s model and Debye model?
  7. Mention the differences between free electron gas and ordinary gas?
  8. What is Hall effect?
  9. What is Meissner effect?
  10. Explain Type I superconductor.

PART – B

Answer any FOUR questions.                                                                              (4×7.5=30marks)

 

  1. a) What are Miller indices?
  1. b) Calculate the ratio of d100 : d110 : d111 for simple cubic structure.
  1. Write a note on neutron diffraction.
  2. Debye temperature of diamond is 1850 K. Calculate the molar specific heat for diamond at 20 K. Also compute the highest lattice frequency involved in the Debye theory.

(R = 8.4 J.mol– 1.K– 1  ,h = 6.62 X 10– 34 Js kb = 1.38 X 10– 23 J.K– 1 ).

  1. Discuss the variation of density of states with energy for a free electron gas in 3-d.
  2. Explain Josephson effect.

PART – C

Answer any FOUR questions.                                                                   (4×12.5=50marks)

 

  1. Describe three dimensional lattice types with suitable diagrams.
  2. Explain the powder method of X-ray diffraction studies.
  3. Derive an expression for the specific heat of a solid on the basis of Einstein’s theory.
  4. Derive an expression for the paramagnetic susceptibility of a free electron gas.
  1. Explain the occurrence of superconductivity based on BCS theory.

 

 

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Loyola College B.Sc. Physics April 2012 Solid State Physics Question Paper PDF Download

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

SIXTH SEMESTER – APRIL 2012

PH 6610/PH 6606 – SOLID STATE PHYSICS

 

 

 

Date : 18-04-2012              Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

PART – A

Answer all questions. All questions carry equal marks:                                        (10 x 2 = 20 marks)

 

  1. Define Bravais lattice.
  2. Copper crystallizes in FCC structure and the atomic radius r = 1.278A˚. Calculate the lattice parameter and hence the cell volume.
  3. State two significant uses of Laue’s diffraction technique.
  4. State Bragg’s law.
  5. Define specific heat capacity.
  6. State Einstein’s assumption in deriving the expression for specific heat. What was the major drawback of this method?
  7. State Wiedemann Franz law.
  8. What is Hall constant? How is this employed to determine charge concentration?
  9. What is Levitation?
  10. Give the difference between Type I and Type II superconductors.

 

PART – B

Answer any FOUR questions:                                                                                 (4 x 7.5 = 30 marks)

  1. Describe the seven crystal systems in three dimension, illustrating the lattice parameters for

atleast one kind in each system.

  1. Explain the condition for diffraction to occur by deriving the Laue’s equations.
  2. Derive an expression for density of modes for a cube (3d) of edge L.
  3. Derive expression for electric conductivity using Sommerfield theory.
  4. Explain the phenomenon of superconductivity using the BCS theory.

 

PART – C

Answer any FOUR questions:                                                                                 (4 x 12.5 = 50 marks)

  1. (a) What are Miller Indices? Write the procedure for finding the Miller Indices of a

given plane.

(b) Determine the Miller Indices of set of planes that make an intercept in the ratio of

4a:4b on the x and y axis and is parallel to z axis, a, b and c being the primitive

vectors.

  1. (a) Explain the determination of crystal structure using rotating crystal method.
  • A beam of x-rays is incident on a NaCl crystal with lattice spacing 0.282nm. Calculate the wavelength of x-ray if the first order Bragg’s reflection takes place at a glancing angle of 8˚35’. What is the maximum order of diffraction possible?
  1. Derive the expression for specific heat of a solid using Debye Model.
  2. Obtain the expression for paramagnetic susceptibility of a free electron gas.
  3. Write notes on
  • Meissner Effect (b) Josephson Effect

 

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Loyola College B.Sc. Physics April 2015 6th Sem Solid State Physics Question Paper PDF Download

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Loyola College B.Sc. Physics April 2016 6th Sem Solid State Physics Question Paper PDF Download

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Loyola College B.Sc. Physics Nov 2016 Solid State Physics Question Paper PDF Download

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