B.Sc Corporate Physics Question Paper 2004

Loyola College B.Sc. Physics April 2004 Properties Of Matter And Thermal Physics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI –600 034

B.Sc., DEGREE EXAMINATION – PHYSICS

FIRST SEMESTER – NOVEMBER 2004

PH 1500/PHY 500 – PROPERTIES OF MATTER AND THERMAL PHYSICS

 

01.11.2004                                                                                                           Max:100 marks

1.00 – 4.00 p.m.

 

SECTION – A

 

Answer ALL the questions.                                                                           (10 x 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. State Hooke’s Law. Give the dimensional formula of modulus of elasticity?
  3. Define the coefficient of viscosity of a liquid. What is the effect of temperature upon it?
  4. Calculate the excess of pressure inside a soap bubble of radius 3 x 10-3 Surface tension of soap solution is 20 x 10-3 N/m.
  5. Calculate the mean free path of a gas molecule given that the molecular diameter is

2 x 10-10 m and the number of molecules per cubic metre is 3 x 1025.

  1. What are intensive and extensive variables?
  2. What is Clausius statement of the second law of Thermodynamics?
  3. State the conditions required for a reversible process in thermodynamics.
  4. What is meant by an equation of State?
  5. What is a second order phase transition?

 

SECTION – B

 

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

 

  1. a) Derive an expression for the variation of acceleration due to gravity with latitude.   (5)

 

  1. b) How many times faster than the present speed would the earth have to rotate about its

axis, in order that the apparent weights of bodies at the equator be zero.                 (2.5)

 

  1. a) Derive an expression for the moment of the couple required to twist one end of a

cylinder when the other end is fixed.                                                                           (5)

 

  1. b) Calculate the elastic energy stored up in a wire originally 5 m long and 10-3 m in

diameter which has been stretched by 3 x 10-4 m due to a load of 10 kg.                (2.5)

 

  1. Derive a general expression for the excess of pressure across a curved liquid surface.

 

  1. Given the equation of state F (p, v, T) = 0, obtain the thermodynamic relation and hence obtain the coefficient of cubical expansion b for a Van der wall gas.
  2. Deduce Maxwell’s four thermodynamic relations.

SECTION – C

 

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

 

  1. a) Define the three moduli of elasticity and derive the relationship between them. (9)

 

  1. b) A rectangular bar, 2 cm in breadth, 1 cm in thickness and 1 m in length is supported at

its middle.  Calculate the depression of the young’s modulus of the material of the bar

is 2 x 1011 N/m2.                                                                                                         (3.5)

 

  1. a) Derive Poiseuille’s formula for the rate of flow of liquid through a capillary tube. (8.5)

 

  1. b) A capillary tube 10-3 m in diameter and 0.2 m in length is fitted horizontally to a vessel

kept full of alcohol of density 0.8 x 103 kg/m3.  The depth of the centre of the capillary

tube below the surface of alcohol is 0.3 m.  Viscosity of alcohol is 0.0012 N.S/m2.

Calculate the volume of alcohol that flows in 5 minutes.                                            (4)

 

  1. a) Obtain Clausius inequality relation.           (8.5)

 

  1. b) One kilogram of water at 7oC is mixed with 3 kilogram of water at a temperature of

47oC in a thermally insulated versel.  Find the change in entropy of the Universe

(Given Cp of water is 4180 J/kg/k).                                                                             (4)

 

  1. Explain Joule – Kelvin experiment and inversion curve and obtain an expression for

Joule – Kelvin coefficient.

 

  1. a) Derive an expression for the coefficient of viscosity of a gas on the basis of kinetic

theory of gases.                                                                                                            (8)

 

  1. b) How does the coefficient of viscosity of gas depend upon temperature and pressure? (2)

 

  1. c) The density of nitrogen at atmospheric pressure is 1.25 kg/m3. Find the R.M.S.

velocity of nitrogen molecule.                                                                                     (2.5)

 

 

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Loyola College B.Sc. Physics April 2004 Electronics II Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

FIFTH SEMESTER – NOVEMBER 2004

PH 5401 / PHY 401 – ELECTRONICS II

 

DATE             : 01.11.04                                                                              Max. : 100 Marks

TIME :1.00 – 4.00                                                             Time : 3 Hrs

 

 

PART A

 

Answer all questions                                                  (10 X 2 = 20)

 

 

  1. Calculate the voltage gain of a non-inverting amplifier with feedback resistance of 20 kW and input resistance of 1 kW.
  2. State any four properties of an ideal op-amp.
  3. Define the terms i) Resolution ii) linearity of A/D converter.
  4. Find the analog output voltage of a 3 bit D/A converter for all possible inputs with K = 1.
  5. Distinguish between discrete and integrated components.
  6. Define various scales of integration of integrated circuit.
  7. What is an instruction cycle?
  8. What is machine cycle?
  9. Tabulate the role of status lines of INTEL 8085.
  10. Write an assembly language program to add two 8 bit numbers.

 

PART B

 

Answer any four                                                                 (4 X 7.5 = 30)

 

  1. Set up a circuit to solve the simultaneous equations x + 2 y = 3; 2x + 3y = 5.
  2. Explain the functioning of successive approximation A/D converter.
  3. Write note on monolithic and thin film process used in the fabrication of IC’s
  4. Discuss the functioning of the following         i)IO/M          ii) INTR         iii)INTA iv)HOLD           v)HLDA                            vi) READY      vii) RD
  5. Classify 8085 instruction in various groups. Give an example of each.

 

 

PART C

 

Answer any four                                                                 (4 X 12.5 = 50)

 

  1. Explain the functioning of i) logarithmic amplifier and ii) Integrator.
  2. With a neat circuit diagram, explain the working of an op-amp based binary weighted D/A Converter.
  3. Explain with a neat diagram how i) a resistor ii) a transistor and     iii) a diode is fabricated in an integrating circuit.
  4. Draw the block diagram of INTEL 8085 and explain the same in detail.
  5. Discuss the various types of addressing modes of INTEL 8085 with suitable examples.

 

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Loyola College B.Sc. Physics April 2004 Atomic & Nuclear Physics Question Paper PDF Download

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             LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

FIFTH SEMESTER – APRIL 2006

                                                PH 5500 – ATOMIC & NUCLEAR PHYSICS

(Also equivalent to PHY 507)

 

 

Date & Time : 20-04-2006/AFTERNOON   Dept. No.                                                       Max. : 100 Marks

 

 

PART – A

 

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

  1. State Pauli’s exclusion principle.
  2. Distinguish between excitation and ionization potential of an atom.
  3. A photon recoils back after striking an electron at rest. What is the change in the wavelength of the photon?
  4. Find the minimum wavelength of x – rays produced by an x – ray tube operating at 1000 kV.
  5. Define range and stopping power of a – particles.
  6. Calculate the energy equivalent of 1 atomic mass unit.
  7. Distinguish between nuclear fission and fusion.
  8. What are magic numbers?
  9. What is pair production?
  10. What are the fundamental interactions in nature?

PART – B

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

  1. What is Zeeman effect? Derive an expression for Zeeman shift.
  2. a) Explain the origin of characteristic x – rays.           (4.5)
  3. b) State Mosely’s law? What is its importance?       (3)
  4. a) What are isobars and isotones? Give one example for each (4)
  5. b) Calculate the binding energy and binding energy per nucleon of Ca40

Given,              mass of 1 proton = 1.007825 amu.

mass of 1 neutron = 1.008665 amu

mass of  = 39.96259 amu                                                         (3.5)

  1. How was the neutron discovered? Give an account of its production and detection.
  2. Discuss Yukawa’s meson field theory.


PART – C

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

  1. a) Describe Thomson’s parabola method to measure the specific charge of positive ions.                                                                                  (8.5)
  2. b) In a Bainbridge mass spectrograph, singly ionized atoms of Ne20 pass into the     deflection chamber with a velocity of 105 m/s. If they are deflected by a magnetic field of flux density 0.08T, Calculate the radius of their path and where Ne22 ions would fall if they had the same initial velocity.                     (4)
  3. a) Explain millikan’s experimental verification of Einstein’s photoelectric equation.
  4. b)   The wavelength of photoelectric threshold of Tungsten is 2300 .  Determine the kinetic energy of electrons ejected from the surface by ultraviolet light of wavelength 1800 .
  5. Give the origin of b – ray line and continuous Spectrum. Outline the theory of b – disintegration.
  6. a) Derive the four factor formula for the thermal nuclear reactor. (8.5)
  7. b) A reactor is developing energy at the rate of 3000 kW.  How many atoms of U235 undergo fission per/second?  How many kilograms of U235 would be used in 1000 hours of operation assuming that on an average an energy of 200 in eV is released per fission?                                                                                  (4)
  8. Describe the ‘liquid drop model’ of the nucleus. How can the semi-emirical mass formula be derived from it?  Mention the use of this model.

 

 

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