B.Sc Corporate Physics Question Paper 2010

Loyola College B.Sc. Physics Nov 2009 Electricity & Magnetism Question Paper PDF Download

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

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PHYSICS

FIFTH SEMESTER – NOVEMBER 2010

PH 5509/PH 5506/PH 3500 – OPTICS

 

 

 

Date : 03-11-10                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

SECTION – A

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

  1. What are nodal points and nodal planes?
  2. Define the term dispersive power.
  3. A biprism is placed at a distance of 4cm from a narrow slit illuminated by a sodium light of

wavelength 5890 ×10-10m. The distance between the coherent sources is 0.06cm.  Find the

width of the fringes observed in an eyepiece placed at a distance of 80cm from the biprism.

  1. What is meant by antireflective coating?
  2. What is a zone plate?
  3. Define resolving power of an optical instrument.
  4. State Malus law.
  5. Calculate the thickness of quarter-wave plate given that μe= 1.563, μ0 = 1.543 and

λ = 6×10-7cm.

  1. What is meant by optical pumping? Mention any two methods of pumping.
  2. What is meant by second harmonic generation?

 

SECTION – B

 

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

  1. Derive the conditions for the combination of two narrow angled prisms to produce

dispersion without deviation.  Also mention its practical application.

  1. (a) Explain how white and dark interface fringes are formed using white light in Lloyd’s

single mirror experiment.

(b) Light of wavelength 6000 falls normally on a thin wedge shaped film of refractive

index 1.45 forming fringes that are 1.8mm apart.  Find the angle of wedge.

  1. Discuss the Fraunhofer diffraction due to a single slit.
  2. How would you produce and detect circularly polarised light?
  3. (a) What are the components of a laser?

(b) Describe Ruby laser and explain its working.

 

SECTION – C

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

  1. (a) Explain chromatic aberration. Derive the condition for achromatism of two lenses

separated by a distance.

(b) Two lenses of focal length 5cm and 2cm are placed at a certain distance apart.

Calculate the distance between the lenses if they form achromatic combination.

  1. Describe the construction and working of Michelson’s interferometer. Explain how the

wavelength of a monochromatic source can be determined using this interferometer.

  1. Discuss the Rayleigh’s Criterion for the limit of resolution. Obtain an expression for the

resolving power of a plane diffraction grating.

  1. (a) Define specific rotation.

(b) Describe the working of a half shade polarimeter and explain how it is used to

determine the specific rotation of sugar.

  1. Discuss Einstenis’s theory of stimulated absorption, spontaneous emission and stimulated

emission and hence deduce the conditions for laser action.

 

 

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Loyola College B.Sc. Physics Nov 2010 Physics For Mathematics – I Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PHYSICS

THIRD SEMESTER – NOVEMBER 2010

PH 3104 / 3100 – PHYSICS FOR MATHEMATICS – I

 

 

 

Date : 10-11-10                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART A

Answer ALL questions:                                                                                             10 x 2 = 20

 

  1. Distinguish between distance covered and displacement of an object in motion.
  2. What are generalized co-ordinates in Lagrangian formulation?
  3. State any two laws of planetary motion due to Kepler.
  4. What is gravitational red shift?
  5. State Hooke’s law of elasticity
  6. Explain the term “viscosity” of a fluid.
  7. What are the characteristics of an ideal operational amplifier?
  8. What do you understand by flip-flop ?
  9. A rod of one meter length is moving along its length with a velocity 0.6c. Calculate its length as it appears to an observer on earth?
  10. State Einstein mass-energy relation.

 

PART B

Answer any FOUR questions:                                                                                   4 x 7.5 = 30

  1. Explain distance –time graph and velocity –time graph for an object executing horizontal motion.
  2. Explain the variation of acceleration due to gravity with i) altitude and ii) depth.
  3. Obtain the expression for excess pressure over (i) a curved surface and (ii) a cylindrical drop.
  4. With circuit diagrams explain the working of an op-amp based integrator and a differentiator.
  5. Derive Lorentz transformation equations from special theory of relativity.

 

PART C

Answer any FOUR questions:                                                                                   4 x 12.5 = 50

  1. Show that path of a projectile projected at an angle α to the horizontal is a parabola. Derive an expression for its time of flight, maximum height reached and horizontal distance covered.
  2. What is a stationary satellite? Define escape velocity. Show that the escape velocity from the surface of the earth is 11 km/s.  Distinguish between orbital velocity and escape velocity.
  3. With a neat sketch explain how you will determine the surface tension of a given liquid by capillary rise method
  4. What are electronic counters? Explain four bit binary up counter with a suitable diagram.
  5. Describe Michelson-Morley experiment. Discuss the results of the experiment.

 

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Loyola College B.Sc. Physics Nov 2010 Properties Of Matter & Acoustics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PHYSICS

FIRST SEMESTER – NOVEMBER 2010

PH 1502/PH 1501 – PROPERTIES OF MATTER & ACOUSTICS

 

 

 

Date : 10-11-10                     Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

PART – A

 

Answer ALL questions                                                                                            (10 x 2 =20 marks)

 

  1. Define Bulk modulus of elasticity with mathematical expression.
  2. A load of 2 kg weight produces an extension of 1 mm in a wire of length 3 meters and 1 mm in diameter. Calculate the young’s modulus of the wire. (g = 9.8 m / s2)
  3. Define stream line and turbulent motion of liquid.
  4. Define co-efficient of viscosity. Give its S.I unit.
  5. Define surface tension of a liquid. What are its dimensions and unit?
  6. What is adhesion and molecular range in surface tension?
  7. Explain the term wave motion. Distinguish between transverse and longitudinal wave motion.
  8. What are beats?
  9. What is piezoelectric effect?
  10. Define reverberation.

PART – B

 

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

 

  1. Derive the expression for the period of oscillation a torsion pendulum.                     (7.5)
  2. Describe and explain the working of the rotatary oil pump.         (7.5)

 

  1. a) Describe Jaeger’s method for determining the surface tension of a liquid.         (4.5)

 

  1. b) Calculate the excess of pressure between the inside and outside of a soap bubble of

radius 1 cm surface tension of soap solution is 3.2 x 10-2N /m.                                          (3)

 

  1. a) Discuss the vibration of the air column in a closed organ pipe. (4)

 

  1. b) Two open organ pipes of lengths 50 cm and 50.5 cm produce 3 beats / second.

Calculate the velocity of sound in air.                                                                      (3.5)

 

  1. a) Write any two properties of ultrasonic waves. (2)

 

  1. b) Explain how ultrasonics is produced in a magnetostriction oscillator.         (5.5)

 

PART – C

 

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

 

  1. a) Describe Koenig’s method for the determination of young’s modulus of a beam. (9.5)

 

  1. b) Find the amount of work done in twisting a steel wire of radius 10 -3 m and of length 0.25 m

through an angle of 450. Given G for steel = 8 x 1010 Nm-2.                                                        (3)

 

  1. a) Derive Poiseuille’s formula for the rate of flow of a liquid through a capillary tube. (9.5)

 

  1. b) Calculate the mass of water flowing in 10 minutes through a tube 0.001 m diameter and 0.4

m long if there is a constant pressure head of 0.2 m of water. The co-efficient of viscosity of

water is 0.00082 Nsm-2                                                                                                                     (3)

 

  1. a) Describe Quincke’s method to determine the surface tension and angle of contact of

mercury.                                                                                                                                           (9.5)

 

  1. b) There is a minute circular hole at the bottom of a small hollow vessel. The vessel has to be

immersed in water to a depth of 0.4 m, before any water penetrates inside. Find the radius

of the holes, if the surface tension and density of water be 73 x 10-3 Nm-1 and 1000 kgm-3

respectively.                                                                                                                                        (3)

 

  1. a) Explain Doppler Effect.  (3)

 

  1. b) Derive an expression for the change in frequency.

(i) Observer is at rest and source in motion (ii) Observer in motion and source is at rest and

(iii) Observer and source in motion and write the limitations of Doppler effect.                  (9.5)

 

  1. a) Derive the Sabine’s formula for reverberation time.         (8)

 

  1. b) Write a short note on noise reduction.                    (4.5)

 

 

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Loyola College B.Sc. Physics Nov 2010 Thermodynamics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PHYSICS

THIRD SEMESTER – NOVEMBER 2010

PH 3505/PH 3503 – THERMODYNAMICS

 

 

 

Date : 02-11-10                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

SECTION – A

Answer ALL the questions                                                                                         (10×2=20)

 

  1. Define the mean free path and the mean free time.
  2. Calculate the r.m.s. velocity for oxygen molecules at . Given mass of

oxygen is 5.31x and the Boltzmann’s constant k= 1.38x J/K.

  1. Write down the equation of state for an ideal gas when it undergoes a (i) reversible isothermal and (ii) adiabatic changes.
  2. What is super fluidity?
  3. The internal energy of an ideal gas does not change with its volume. Why?
  4. State the second law of thermodynamics.
  5. Define the molar heat of transformation and give its unit.
  6. State Ehrenfest’s classification of phase transitions.
  7. Define thermodynamic probability.
  8. Classify the following particles according to the statistics they obey:
  9. i) electrons     ii) photons  iii) protons and   iv) helium-4.

 

SECTION – B

 

Answer Any FOUR the questions                                                                  (4×7.5=30)

 

  1. Obtain the expression for the pressure of an ideal gas, from the kinetic

theory of gases, and hence the ideal equation of state.                                   (5+2.5)

  1. Describe Linde’s process for the liquefaction of air.
  2. a)What are intensive and extensive variables? Give examples.                            (3)
  3. b) Obtain the equation of state for an ideal gas undergoing an adiabatic process. (4.5)
  4. Obtain the following expression for the Joule-Kelvin coefficient,.
  5. a) Define phase space.                                                                                                 (1.5)
  6. b) In how many ways can 3 particles be distributed among 4 states according

to the three statistics.                                                                                         (2+2+2)

SECTION – C

 

Answer Any FOUR questions                                                                             (4×12.5=50)

 

  1. a) What is Brownian motion?                                                                                         (2)
  2.      b) Discuss the Langevin’s theory of Brownian motion.                                               (10.5)
  3. a) Explain Clement and Desormes method for determining.            (9.5)
  4. b) Given = 20.3J/mol.-K and R =8.3J/mol.-K, calculate the ratio

of specific  heats.                                                                                                          (3)

  1. a) Derive the Clausius-Clayperon equation involving the latent heat.                      (6)
  2. b) Derive the Clausius inequality.                      (6.5)
  3. a) Obtain the expression for the change in the entropy of an ideal gas.                      (7.5)
  4. b) One mole of an ideal gas occupies 10 liters of volume at 4 atm.

The gas is heated at constant volume till its pressure is 8atm. Then it is

allowed to expand at constant pressure. If its final volume is 40 liters,

calculate the change in its entropy.

Given = 3 cal/mol-K and R = 2 cal/mole-K.                                                                  (5)

  1. For an ideal Bose gas, obtain the Bose-Einstein distribution for the number of

particles  in each energy level.

 

 

 

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Loyola College B.Sc. Physics April 2010 Mechanics & Sound Question Paper PDF Download

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Loyola College B.Sc. Physics Nov 2010 Material Science Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PHYSICS

FIFTH SEMESTER – NOVEMBER 2010

PH 5405 / 5402 – MATERIAL SCIENCE

 

 

 

Date : 11-11-10                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

Section – A

Answer all the questions:                                                                                          (10×2 = 20)

  1. Define primary and secondary bonds.
  2. Give two methods for determining electronic structure.
  3. Define space lattice and basis.
  4. Distinguish between ionic and covalent bond.
  5. What is meant by true stress and true strain? Give the power relation connecting them.
  6. Give the expression for Young’s modulus of a composite material.
  7. Define Curie temperature.
  8. Distinguish between hard and soft magnetic materials.
  9. Give the principle of X-ray and Gamma ray radiographic techniques.
  10. Define magnification power of a microscope.

 

Section – B

Answer any four questions:                                                                                     (4×7.5 = 30)

  1. Discuss stable, unstable and metastable states with the help of a tilting rectangular block.
  2. Outline the theory of ferroelectrics using the structure of Barium Titanate as an example.
  3. (a) Find the Miller Indices of a plane in an orthorhombic unit cell (a:b:c = 1:2:3) making intercepts of 3,2,1 A ­­­0 on a,b,c axes respectively.

(b) The Bragg angle corresponding to the first order reflection from (1,1,1) planes in a crystal is 300 when X – rays of wavelength 1.75A0 are used. Calculate the interatomic distance, ‘a’.

  1. Discuss “elastic modulus as a parameter in design”.
  2. Describe the ultrasonic method of NDT with neat sketch and mention its advantages over other methods of NDT.

Section – C

Answer any four questions:                                                                                     (4×12.5 = 50)

  1. Discuss in detail, the three important steps involved in the formation of ionic bond with specific reference to NaCl crystal.
  2. Outline the atomic model of elastic behaviour. Obtain the relation between Young’s modulus (Y), Bulk modulus (K), Rigidity modulus (G), and Poisson’s ratio (µ).
  3. Draw the sketch of a scanning electron microscope and discuss its working.
  4. Discuss in detail, various point defects in crystals.
  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 2010 Gravitation And Cosmology Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034      LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034        M.Sc. DEGREE EXAMINATION – PHYSICSTHIRD SEMESTER – NOVEMBER 2010    PH 3952  – GRAVITATION AND COSMOLOGY
Date : 09-11-10 Dept. No.   Max. : 100 Marks    Time : 9:00 – 12:00                                              PART AANSWER ALL QUESTIONS 10 X 2 = 201. What are the two approaches to General Relativity ?2. State Mach principle.3. What are pseudo tensors ? Give an example.4. When is an affine connection said to be Riemannian ?5. State Birkhoff theorem.6. What is Thomas precession ?7. Define nucleonic mass of a compact spherical object.8. When does the general relativistic contribution to the binding energy of a QSO become significant ?9. State Hubble’s law.10. State the cosmological principle.
PART BANSWER ANY FOUR  QUESTIONS                                                        4 X 7.5 = 3011. Explain  the conflict between Newtonian gravitation and special Relativity.12     Deduce the conservation law for the energy-momentum tensor..13     Derive the most general spherically symmetric line element.14    Show that in the extremely dense state of nuclear density the nucleonic mass which can be supported in equilibrium is less than three solar masses.15     Explain Olber’s paradox.How is it resolved?PART CANSWER ANY FOUR QUESTIONS 4 X 12.5 = 50
16. (a)Explain and interpret the Lie derivative of A along B , where A and B are two vector fields.(b) Show that the Christofel symbols do not transform like a tensor. (5+7.5)17. (a)Explain the two important properties of a geodesic.(b) Obtain the equation for a  geodesic . (6+6.5)18  (a) Discuss particle orbits in the Schwarzschild space-time using Newtonian approximation.(b) Calculate the radar echo delay due to the Sun’s gravitational field. (7.5+5)19. (a) Discuss the Schwarzschild solution of Einstein’s equation and obtain the exterior Schwarzschild metric.(b) Discuss Fowler’s  theory of a QSO. (7.5+5)20.  (a) Explain the significance of the cosmic microwave background.(b) Discuss the observational background of cosmology. (6+6.5)

 

 

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Loyola College B.Sc. Physics Nov 2010 Geophysics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PHYSICS

FIFTH SEMESTER – NOVEMBER 2010

PH 5403 / 5400 – GEOPHYSICS

 

 

 

Date : 13-11-10                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART – A

Answer all questions                                                                                                   (10 x 2 = 20)

  1. Differentiate between Love and Rayleigh waves
  2. How are the ages of a rock determined?
  3. What is a travel time curve?
  4. What are the important consequences of radioactive disintegration?
  5. Give the empirical relation for energy of alpha particles emitted.
  6. Explain the principle involved in radioactive dating of rocks.
  7. Define the term hypocenter and focus of an earthquake.
  8. What is meant by Mohorovicic discontinuity?
  9. What are the different types of fault occurring in an earthquake?
  10. What was the conclusion drawn by Gauss on the main field of the earth?

PART – B

Answer any four questions                                                                                        (4×7.5=30)

  1. Explain the Ritcher scale of magnitude. State the relation between the magnitude and energy released in earthquake.  Compare the energy released for earthquake of magnitude M=5 and M=3
  2. Explain the dynamo theory of Earth’s magnetism
  3. Explain the principle and working of Worden gravimeter.
  4. Describe the principle and working of a proton precession magnetometer.
  5. (a) Explain geological time scale                                              (2)

(b) Explain the working of a strain seismograph                        (5.5)

PART – C

Answer any four questions                                                                                        (4×12.5=50)

  1. (a) Write a note on direct & indirect effects of earthquake.     (6)

(b) Derive Adams and Williamson equation for the variation of density with depth.    (6.5)

  1. Obtain the seismograph equation for a horizontal seismograph & deduce the two types of instrumentation based on the equation
  2. Give the decay theory of radioactive dating of rocks and minerals using  (a) decay scheme of Rb87  and (b) decay scheme of K40
  3. (a) Explain in detail the plate tectonic theory.

(b) Discuss the variation of temperature with depth of the earth.

  1. Write short notes on the following

(a) Intensity of an earthquake                 (4.5)

(b) Alkali vapour magnetometer.            (8)

 

 

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Loyola College B.Sc. Physics Nov 2010 Electronics – II Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PHYSICS

FIFTH SEMESTER – NOVEMBER 2010

PH 5404 / 5401 – ELECTRONICS – II

 

 

 

Date : 09-11-10                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART A

ANSWER ALL QUESTIONS                                                                                            10 x 2 = 20

  1. Draw the output waveform of an integrator for a square wave input.
  2. Draw the circuit diagram of a second order high pass filter.
  3. For a 5 bit R-2R ladder D/A converter, calculate the output for a digital input of 10101. Assume 0 = 0V and 1 = 5V.
  4. Differentiate between analog and digital signals.
  5. Give any four advantages of integrated circuits.
  6. Write a short note on linear IC’s.
  7. What is direct addressing mode? Explain with example.
  8. Write a short note on DAA instruction.
  9. What do pins ALE, HLDA denote in microprocessor 8085?
  10. What is the output of the following program?

MVI A, 03;     RLC;   RLC;   ADI, 01;          HLT

PART B

ANSWER ANY FOUR QUESTIONS                                                                               4 x 7.5 = 30

  1. Solve the following differential equation using operational amplifiers.

d2y/dt2 + 2dy/dt + 3y – 1 = 0.

  1. With a neat diagram explain the working of a counter type A/D converter.
  2. Discuss in detail the classification of IC’s based on their structure.
  3. Write an assembly language program to determine the square root of a given number by indirect mode of addressing.
  4. Write a short note on arithmetic and logical instructions.

PART C

ANSWER ANY FOUR QUESTIONS                                                                               4 x 12.5 = 50

  1. What is instrumentation amplifier? Explain it with a neat diagram (5)
  2. Explain in detail an Op-Amp based monostable multivibrator with a neat diagram. (7.5)
  3. Explain with circuit, the working of an op-amp based 4 bit binary weighted D/A converter.
  4. For a 5 bit binary weighted resistor D/A converter network, determine the following
    (i) output voltage when LSB is set. (ii) Output voltage for 11010 (iii) Full scale voltage. Assume 0 = 0V and 1 = 10V. (6)
  5. Explain the fabrication of a bipolar transistor and explain how a bipolar transistor can be used as a diode.
  6. Write a short note on the different registers in microprocessor 8085. (5).
  7. Write an assembly language program to solve the given equation (x+y)/z by indirect mode of addressing. (7.5).
  8. Write an assembly language program to sort the given set of 10 numbers in ascending order.

 

 

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Loyola College B.Sc. Physics Nov 2010 Electronics – I Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PHYSICS

THIRD SEMESTER – NOVEMBER 2010

PH 3504/PH 3502/PH 5501 – ELECTRONICS – I

 

 

 

Date : 30-10-10                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

PART  A

Answer  ALL  questions:                                                                                             (10 x 2 = 20 marks)

 

 

  1. Define a Constant voltage source.
  2. State Maximum Power transfer theorem.
  3. What is Zero signal collector current? What is its significance?
  4. Define Class A Power amplifier. What is its maximum efficiency?
  5. Define CMRR of a differential amplifier. How can it act as a figure of merit of a difference amplifier?
  6. Define ‘Inversion Layer’ with reference to MOSFET.
  7. What input conditions of a JK flip flop makes it toggle?
  8. What is the difference between a Decoder & a Multiplexer?
  9. How many flip flops are required to store a decimal no.100110 in a binary register.
  10. Mention any two differences between ROM & RAM.

 

PART  B

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

 

  1. A constant dc voltage of 10 volts is connected in series with resistances 4Ω & 3Ω. Another load resistance RL is connected across the 3Ω resistance. Use Norton’s theorem to determine the current through RL in the circuit.
  2. What is the need for biasing the transistor? Explain the Fixed Bias method and the disadvantages faced in this method of biasing.
  3. Draw the circuit of i) Summing & ii) Difference Amplifier using Op-Amp and obtain an expression for their output.
  4. Draw the logic circuit of a D- Flip Flop and explain its working. How it can be modified to function as a T flip flop?
  5. Explain with the circuit the working of a decade counter using JK – flip flops.

 

 

 

 

 

PART  C

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

 

  1. Describe the analysis of a transistor amplifier in CE mode using ‘h’ parameter and obtain the expression for Ai, AV and Z
  2. Draw Phase Shift oscillator circuit using Transistor and explain its working.
  3. Explain the mechanism of current conduction in a SCR. Explain the action of SCR as a half wave rectifier.
  4. Using K-map simplify the Boolean function:

F(A,B,C,D) = ∑(0,2,4,5,6,10,12,14). Implement the simplified expression using NAND gates only.

  1. Draw a 4-Bit RING counter using JK flip flops and describe the sequence of operations. What is the modulus of the counter?

 

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Loyola College B.Sc. Physics Nov 2010 Electricity & Magnetism Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PHYSICS

FIFTH SEMESTER – NOVEMBER 2010

PH 5508/PH 5505/PH 4500 – ELECTRICITY & MAGNETISM

 

 

 

Date : 01-11-10                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

SECTION – A

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

  1. State Guass’s law in electrostatics.
  2. A capacitor of capacity 20μF is charged to a potential of 1000 volt. Calculate the energy stored in the

capacitor.

  1. State Kirchhoff’s laws of distribution of currents in an electrical network.
  2. Distinguish between Peltier effect and Joule effect.
  3. What is meant by Lorentz force?
  4. Define mutual inductance between pair of coils.
  5. A capacitor of capacitance 2μF is discharged through a high resistance. The time taken for half of the

charge on the capacitor to leak is found to be 20 seconds. Calculate the value of the high resistance.

  1. Why a Choke coil is preferred to a resistor in an ac circuit?
  2. Define the terms magnetic susceptibility and magnetic permeability.
  3. What is meant by Poynting vector?

SECTION – B

 

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

  1. (a) Derive an expression for the electric field at any point due to an electric dipole.

(b) An electric dipole moment 2.5 × 10-8 Cm is placed in a uniform field of intensity 2.0 × 105

NC-1.  How much work is done on turning the dipole end to end?

  1. (a) Define specific conductivity of an electrolyte.

(b) Describe Kohlrausch bridge experiment to determine the specific conductivity of an

electrolyte.

  1. Give the theory of Helmholtz galvanometer.
  2. (a) Derive an expression for the rms value of an alternating current.

(b) Give the theory of choke coil.

  1. (a) Give a brief account of domain theory.

(b) How would you explain ferromagnetism using domain theory?

 

SECTION – C

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

 

  1. (a) Define farad.

(b) A capacitor consists of two concentric spheres. Find the capacitance when (i) the inner sphere is

charged and the outer sphere is earthed and (ii) when the outer sphere is charged and the inner

sphere is earthed.

  1. (a) What is thermo emf?

(b)  Describe a method of measuring thermo emf.

(C) What are thermo electric diagrams?  Mention a few of their uses.

  1. (a) Give the theory of an earth inductor.

(b)  Describe how the earth inductor can be used to determine Earth’s horizontal field induction

BH at a place.

  1. Discuss the theory of decay of charge in an LCR circuit.
  2. Discuss the properties of dia, para and ferromagnetic materials.

 

 

 

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Loyola College B.Sc. Physics Nov 2010 Atomic & Nuclear Physics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PHYSICS

FIFTH SEMESTER – NOVEMBER 2010

PH 5507/PH 5504/PH 5500 – ATOMIC & NUCLEAR PHYSICS

 

 

 

Date : 29-10-10                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART – A

Answer ALL questions:                                                                                                       (10×2=20 Marks)

 

  1. State Pauli’s exclusion principle.
  2. Why is an inhomogeneous magnetic field required in Stern-Gerlach experiment?
  3. Define isobar and isotope with examples.
  4. Define packing fraction.
  5. Write a note on magnetic moment of the neutron.
  6. What is a chain reaction.
  7. What are cosmic ray showers?
  8. Write down the quark content of proton and neutron.
  9. What is Larmor precession?
  10. What is Mossbauer spectroscopy?

PART – B

Answer any FOUR questions:                                                                                             (4×7.5=30 Marks)

 

  1. Explain the types of coupling schemes between the orbital and spin angular momenta. (4+3.5)
  2. a) Define mass defect and binding energy.
  3. b) Explain the variation of binding energy with mass number and discuss its salient

features.                                                                                                                                                (4+3.5)

  1. Discuss the liquid drop model of a nucleus. 14. a) State the conservation laws obeyed by elementary particles.
  2. b) Explain the conservation of baryon and lepton numbers with examples.   (3×2.5)                                                 Discuss the principles of NMR spectroscopy.

PART – C

Answer any FOUR questions:                                                                                              (4×12.5=50 Marks)

 

  1. a) Distinguish between normal and anomalous Zeeman effects.                                                         (3)
  2. b) Derive an expression for Lande’s splitting factor and explain the anomalous Zeeman
    effect for sodium doublet lines D1 & D                                                                                                                           (9.5)
  3. a) What is the range of an α particle and explain how it is determined experimentally?       (2+6.5)

 

  1. b) What is the minimum energy required to break a 2He4 nucleus into free protons and neutrons?

The masses of hydrogen atom, a neutron and the 2He4 atom in a.m.u. are 1.007825, 1.008665 and

4.002603 respectively.                                                                                                                          (4)

  1. Write a note on discovery properties and production of neutrons.                     (6.5+6)                      19.  Discuss the semi-empirical mass formula for a nucleus and explain different terms of it.
  2. Explain in detail chemical shift and its measurement.                 (6+6.5)

 

 

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