B.Sc Corporate Physics Question Paper 2006

Loyola College B.Sc. Physics Nov 2006 Prop.Of Mat.& Thermal Physics Question Paper PDF Download

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                   LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

AC 01

FIRST SEMESTER – NOV 2006

PH 1500 – PROP.OF MAT.& THERMAL PHYSICS

(Also equivalent to PHY 500)

 

 

Date & Time : 01-11-2006/1.00-4.00          Dept. No.                                                       Max. : 100 Marks

 

 

PART-A

Answer ALL the questions                                                    (10×2=20 marks)

 

  1. Two spheres of masses 10 kg and 20 kg are 500 cm apart. Calculate the force of attraction between the masses.
  2. What is geometrical moment of inertia in bending of beams?
  3. Give the SI unit and dimensions of coefficient of viscosity.
  4. What is critical velocity of a liquid?
  5. Water wets glass surface, while mercury does not. Why?
  6. Calculate the mean free path of a gas molecule of diameter 3.2 Å. The number of molecules per unit volume is 21.5x 1023 m-3.
  7. What is an intensive variable? Give two examples.
  8. Give the Classius statement of the second law of thermodynamics.
  9. State the law of equipartition of energy.
  10. What is perpetual motion machine of the second kind?

 

PART-B

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

 

  1. Derive an expression for the variation of acceleration due to gravity with latitude.
  2. a) Derive an expression for the bending moment of a bar.                             (4)
  1. b) Find the energy stored in a wire 5 metre long and 10-3 metre in diameter when it is stretched through 3×10-3 metre by a load. Young’s modulus of the   material is 2×1011  N/m2 .                                                                         (3.5)
  2. a) Obtain Mayer’s formula for the flow of a gas through a capillary tube. (5.5)
  3. b) State any two properties of a good lubricant. (2)
  4. a) Derive Classius- Clapeyron equation for liquid-vapour equilibrium. (5)
  5. b) One kilogram of water at 373K is mixed with 1 kilogram of water at 273K. Estimate the change in entropy. (2.5)
  6. Derive Maxwell’s thermodynamical relations.

 

 

PART-C

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

  1. a) Derive the relationship between the three elastic moduli and deduce an expression for Poisson’s ratio.                                                                        (7.5)
  2. b) Calculate the Poisson’s ratio for the material whose

Young’s modulus = 12.25X1010 N/m2 and

Rigidity modulus = 4.55 X 1010 N/m2.                                                      (5)

  1. a) Describe with relevant theory the Quincke’s method for the determination of surface tension and angle of contact of mercury. (10)
  2. b) What would be the pressure inside a small air bubble of 10-4 m radius, situated just below the surface of water? Surface tension of water is 70×10-3 N/m and the atmospheric pressure = 1.012×105 N/m2.                                     (2.5)
  3. a) Explain the transport Phenomena. Derive an expression for the coefficient of viscosity of a gas on the basis of the kinetic theory of gases. (10)
  4. b) How does the coefficient of viscosity of gas depend upon temperature and pressure ?                                                                         (2.5)
  5. a) Obtain the Classius inequality relation of thermodynamics (7.5)
  6. b) Derive Ehrenfest’s equation for a second order phase transition. (5)
  7. Explain Joule-Kelvin experiment and inversions curve and obtain an expression for Joule-Kelvin co-efficient.

 

   

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Loyola College B.Sc. Physics Nov 2006 Materials Science Question Paper PDF Download

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                   LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

AC 08

FIFTH SEMESTER – NOV 2006

PH 5402 – MATERIALS SCIENCE

(Also equivalent to PHY 402)

 

 

Date & Time : 01-11-2006/9.00-12.00      Dept. No.                                                       Max. : 100 Marks

 

 

 

PART A

Answer ALL questions:                                                                 10 x 2 = 20 marks

  1. Give  two examples for organic polymers which are used as engineering materials
  2. Explain briefly how the structure influences the property of materials.
  3. State Bragg’s law of X-ray diffraction.
  4. Draw the diagrams corresponding to the Miller indices (100), (111) and (001).
  5. Give the classification of materials on the basis of Poisson’s ratio.
  6. What is meant by true stress and true strain?
  7. List the advantages of SEM.
  8. Outline any one magnetic method of NDT.
  9. Explain the intrinsic breakdown in a dielectric material.
  10. Write the relation connecting the dipole moment density P and the electric field strength E.

PART B

 

Answer any FOUR questions:                                                      4 x 7.5 = 30 marks

  1. Illustrate the concept of stability and metastability using a tilting rectangular block.
  2. What is meant by symmetry operation?  Explain the symmetry elements of a crystalline solid.
  3. What are the essential features of Rubber like elasticity? Obtain the equation of state of the rubbery material.
  4. With neat diagram explain the Ultrasonic method of NDT.
  5. What are ferroelectric materials?  Discuss their properties.

PART C

 

Answer any FOUR questions:                                                    4 x 12.5 = 50 marks

  1. Discuss the formation of ionic bond in Sodium Chloride crystal.  Hence obtain the expression for the potential energy of the system.
  2. With neat sketch describe the powder method of XRD to determine the crystal structure.
  3. Discuss the atomic model of elastic behavior with necessary figures and derive the relations connecting y, γ, μ and κ.
  4. Draw a schematic diagram of an Electron Microscope and explain its working.
  5. Explain different types of Polarization and derive the expression for the total polarization of a material.

 

 

 

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Loyola College B.Sc. Physics Nov 2006 Atomic & Nuclear Physics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034                                   B.Sc. DEGREE EXAMINATION – PHYSICS

AC 09

FIFTH SEMESTER – NOV 2006

PH 5500 – ATOMIC & NUCLEAR PHYSICS

(Also equivalent to PHY 507)

 

 

Date & Time : 25-10-2006/9.00-12.00     Dept. No.                                                Max. : 100 Marks

 

 

 

PART – A

Answer ALL questions.                                                                     (10 x 2 = 20 Marks)

  1. Define excitation potential and ionization potential of an atom.
  2. What is Paschen-Back effect?
  3. State Mosley’s law.
  4. Describe how a photo-multiplier tube functions.
  5. Explain parity of nuclei.
  6. Define nuclear fission with example.
  7. What is chain reaction?
  8. What are pair production and annihilation?
  9. What are cosmic rays?
  10. Define range of alpha-particle.

PART – B

Answer any FOUR questions.                                                           (4 x 7.5 = 30 Marks)

  1. a. Discus the normal Zeeman effect. (4.5)
  2. Calculate the wavelength separation between the two component lines which

are observed in the normal Zeeman effect. The magnetic field used is 0.4    weber/m2;

the specific charge is 1.76×1011 C kg-1 and l = 6000 Å .        (3)

  1. State and explain the laws of photoelectric effect.
  2. Classify nuclei as isotopes, isobars, isotones, isomers, and mirror nuclei – Give examples.
  3. Explain Bohn and Wheeler theory of nuclear fission and estimate the energy released when a neutron breaks into proton and electron.
  4. Explain the latitude, East-West, and altitude effect of cosmic rays.

 

PART – C

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

  1. a. Describe the construction of Aston’s Mass Spectrograph with necessary theory

and show how it can be used in the detection of isotopes.                (8+4.5)

  1. What are the advantages and limitations of Aston’s Mass Spectrograph? (p.54)
  2. a. Derive Einstein’s photo-electric equation and describe Millikan’s experiment, with theory, to verify the same.
  3. The photoelectric threshold for a metal is 3000 Å. Find the kinetic energy of an electron ejected from it by radiation of wavelength 1200 Å.

(Given: h = 6.62×10-34 Js and c=3×108 ms-1.)                          (9+3.5)

  1. What is nuclear magneton? Describe Rabi’s method to determine nuclear magnetic

moment.

  1. Explain proton-proton and carbon-nitrogen cycle of thermo nuclear fusion.
  2. a. Explain shell model of the nucleus.
  3. Calculate the atomic number of the most stable nucleus for a given mass number A.                                                                                                                              (8+4.5)

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Loyola College B.Sc. Physics Nov 2006 Allied Mathematics For Physics Question Paper PDF Download

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             LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034  B.Sc. DEGREE EXAMINATION – PHYSICS

AA 03

THIRD SEMESTER – NOV 2006

         MT 3100 – ALLIED MATHEMATICS FOR PHYSICS

(Also equivalent to MAT 100)

 

 

Date & Time : 28-10-2006/9.00-12.00         Dept. No.                                                       Max. : 100 Marks

 

 

Section A

Answer ALL the questions (10 x 2 =20)

  • Evaluate .
  • Expand and .
  • Prove that .
  • Find when .
  • Find
  • Find
  • Show that, in the curve , the polar subtangent varies as the square of the radius vector.

8)  Find the coefficient of  in the expansion of .

9)  Find the rank of the matrix

10) Mention a relation between binomial and Poisson distribution.

Section B

Answer any FIVE questions (5 x 8 = 40)

11) Find

12) Find

13) If , prove that.

14) If , prove that .

15) Find the slope of the tangent with the initial line for the cardioid

at   q = .

16) Find the inverse of the matrix using Cayley Hamilton

theorem.

17) Show that  .

18)  Suppose on an average one house in 1000 in Telebakkam city needs television

service  during  a  year. If  there  are  2000  houses  in  that  city,  what  is  the

probability  that exactly  5  houses will need  television service during the year.

Section  C

Answer any TWO questions only (2 x 20 = 40)

19) (a) Using Laplace transform solve  when x (0) = 7.5,

x’(0) = -18.5.

(b) Prove that cosh5x = 16cosh5x – 20cosh3x + 5coshx.                         (12+8)

20) (a) Expand cos4q sin3q in terms of sines of multiples of angle.

(b) If  prove that

(8+12)

21) (a) Find the eigen values and eigen vectors of the matrix

(b) Find the greatest term in the expansion of when .       (15+5)

 

22) (a) Find the angle of intersection of the cardioid and

.

(b) Eight coins are tossed at a time, for 256 times. Number of heads observed at

each throw is recorded and results are given below.

 

No of heads at a throw 0 1 2 3 4 5 6 7 8
frequency 2 6 30 52 67 56 32 10 1

 

What are the theoretical values of mean and standard deviation? Calculate also

the mean and standard deviation of the observed frequencies.                 (10+10)

 

 

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