B.Sc Physics Question Paper

Loyola College B.Sc. Physics April 2008 Mechanics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

FG 06

 

SECOND SEMESTER – APRIL 2008

PH 2501 – MECHANICS

 

 

 

Date : 23/04/2008                Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

SECTION – A

Answer all the questions.                                                                    10×2 = 20 Marks

 

  1. State the law of conservation of angular momentum.
  2. Find the center of mass of three particles of 1kg, 2kg, and 3kg placed at the three corners of an

equilateral triangle of 1metre side.

  1. What are the conditions of equilibrium of a rigid body acted on by three coplanar forces?
  2. Define: (i) Metacentre and (ii) Metacentric height.
  3. What is meant by effusion of gases?
  4. State Torricelle’s theorem.
  5. What are generalized coordinates? What is the advantage of using them?
  6. State the principle of virtual work.
  7. What is a frame of reference? Distinguish between inertial and non-inertial frames.

10.Explain the law of addition of relativistic velocities.

SECTION B

Answer any four questions.                                                   4×7.5 = 30 Marks

 

  1. What is a torsional pendulum? Derive an expression for the time period of oscillation of a

torsional pendulum.

12 (a)  Define center of gravity.

(b)  Determine the position of centre of gravity of a solid tetrahedron.

  1. (a) State and explain Graham’s law of diffusion of gases.

(b) Obtain the equation of continuity for an incompressible fluid in streamline flow.

  1. Apply Lagrange’s equation to determine

(a) motion of a single particle in space and

(b) time period of oscillation of a simple pendulum.

  1. (a) Explain time – dilation with an example.

(b)  A π meson has a mean lifetime of 2×10-8s when measured at rest.  How far does it go before

decaying into another particle if its speed is 0.99c?

 

SECTION C

Answer any four questions.                                                               4×12.5 = 50 Marks

 

  1. What is a compound pendulum? Derive an expression for its time period of oscillation. Explain how the value of g is determined using it.
  2. (a) Define centre of pressure. Determine the position of center of pressure of a rectangular lamina immersed vertically in a liquid with one edge in the surface of the liquid.

(b) Find the thrust on the rectangular end of a tank of width 0.8m and depth 0.5m filled

completely with water. Find the position where it acts.

  1. State and prove Bernoulli’s theorem. Discuss any two applications of this theorem.
  2. (a) State an explain D’Alembert’s principle.

(b) Derive Lagrange’s equations of motion from D’Alembert’s principle for a holonomic

conservative system.

  1. (a) State the basic postulates of Einstein’s special theory of relativity.  Derive the Lorentz space –time transformation formulae.

(b)        A rod 5 metre long is moving along its length with a velocity 0.8c.  Calculate its length as it appears to an observer on the earth.

 

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Loyola College B.Sc. Physics April 2008 Optics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

           B.Sc. DEGREE EXAMINATION – PHYSICS

FG 10

THIRD SEMESTER – APRIL 2008

PH 3500 – OPTICS

 

 

 

Date : 26-04-08                  Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

PART A

Answer all questions:                                                                                                   (10 х 2 = 20)

  1. Define unit planes.
  2. State why crosswires cannot be used in Huygen’s eyepiece?
  3. What are coherent sources?
  4. In Newton’s rings experiment, the diameter of the 8th ring changes from 1.4cm to 1.27cm

when a liquid is introduced between the lens and the plate. Calculate the refractive index

of the liquid.

  1. Define resolving power of an optical instrument.
  2. Compare a zone plate and a convex lens.
  3. What is a half wave plate?
  4. State the laws of optical activity.
  5. What is meant by population inversion?
  6. What is Raman effect?

PART B

Answer any FOUR  questions:                                                                                    (4 х 7.5=30)

  1. a) Discuss with theory the construction of Ramsden eyepiece.                                             (4)
  1. b) Find out the positions of its cardinal points. (3.5)
  1. a) Describe with necessary theory the interference of light by a Lloyd’s mirror.                   (5)
  1. b) In a Lloyd’s mirror experiment, the slit source is at a distance of 2.5 mm from

the mirror.  The screen is at a distance of 1.5m from the source.  Calculate the fringe width.

Wavelength of light is 5890 A.                                                                                               (2.5)

  1. Discuss the missing orders in a double slit diffraction pattern.
  2.  a) Describe the construction and working of a quarter wave plate.                                      (5)
  1. b) Calculate the thickness of a half wave plate of quartz for a wavelength 5000A. Given

(2.5)

  1. Describe the construction and working of a Ruby laser.

 

PART C

Answer any FOUR  questions:                                                                                   (4 х 12.5 = 50)

  1. a) What is meant by chromatic aberration?                                                                             (2.5)
  1. b) Show that chromatic aberration of a lens is equal to the product of the dispersive power

and the mean focal length of the lens.                                                                                                (5)

  1. c) Deduce the condition for achromatism of two lenses separated by a distance. (5)
  1. a) Give the theory of Newton’s rings.                                                                                                (7.5)
  1. b) Describe an experiment to determine the wavelength of light using these rings. (5)
  1. Describe and experiment to determine the wavelength of light using these rings.
  2. a) What is polarization?                                                                                                          (2.5)
  1. b) Explain the production and detection of (i) circularly and

(ii) elliptically polarised light.                         (5+5)

  1. Explain the construction and working of a He-Ne laser.

 

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Loyola College B.Sc. Physics April 2008 Mathematical Physics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

FG 17

 

FOURTH SEMESTER – APRIL 2008

PH 4502 – MATHEMATICAL PHYSICS

 

 

 

Date : 26/04/2008                Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

PART-A

Answer ALL questions                                                                     (10×2=20 marks)

 

  1. What is the principal value of the complex number z=1+i?
  2. Write down the equation of the circle in the complex plane centered at ‘a’ with radius ‘r’.
  3. Evaluate .
  4. What is a single valued function in a complex region.
  5. Find ‘c’ if is solution to the equation
  1. Write down a homogeneous first order partial differential equation.
  2. Define the Fourier sine transform of a function f(x).
  3. If is the Fourier transform of f(x), what is the Fourier transform of .
  4. Define the shift operator on f(x) by ‘h’.
  5. Write down the Simpson’s 1/3 rule for integration.

 

 

PART-B

Answer any FOUR questions                                                          (4×71/2=30 marks)

 

  1. Determine the roots of  and  and locate it in the complex plane.
  2. If ‘C’ is a line segment from -1-i to 1+i, evaluate .
  3. Derive the partial differential equation satisfied by a vibrating elastic string subject to a     tension ‘T’.
  4. Obtain the Lagrange’s interpolation formula for following table:
  1. Find the Fourier sine transform of exp(-at).

 

 

PART-C

Answer any FOUR questions                                                          (4×121/2=50 marks)

 

  1. a) Derive the Cauchy Riemann equation for a function to be analytic.          (5m)
  1. b) Show that the function is harmonic and hence

construct the corresponding analytic function.                                               (71/2m)

 

 

 

  1. a) State and prove Cauchy’s integral theorem.                                               (5m)
  1. b) Verify the Cauchy’s integral theorem for the integral of taken over the boundary of the rectangle with vertices -1, 1, 1+i and -1 +i in the counter clockwise sense. (71/2m)
  1. Solve the heat equation , subject to the conditions u(x=0,t)=0 and u(x=L,t)=0       for all ‘t’.

 

  1. a) State and prove the convolution theorem for Fourier Transforms.             (2+3=5m)
  1. b) Find the Fourier transform of the function f(x) defined in the interval –L to +L, as

(71/2m)

 

  1. Given the following population data, use Newton’s interpolation formula to find the population for the years 1915 and 1929

 

(Year, Population (in Thousands)): (1911, 12) (1921, 15) (1931, 20), (1941, 28).

 

 

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Loyola College B.Sc. Physics April 2008 Mechanics & Sound Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

FG 05

 

SECOND SEMESTER – APRIL 2008

PH 2500 – MECHANICS & SOUND

 

 

 

Date : 23/04/2008                Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

SECTION – A

Answer all the questions.                                                                    10×2 = 20 Marks

 

  1. Two ships A and B are sailing due east and due south with velocities 30km/hr and 40km/hr respectively. Find the velocity of ship A relative to the ship B.
  2. What is the physical significance of moment of inertia?
  3. Define: (i) Metacentre and (ii) Metacentric height.
  4. Show that the algebraic sum of the moments of two forces forming a couple is equal to the moment of the couple.
  5. What is meant by phase space?
  6. Distinguish between holonomic and non-holonomic constraints.
  7. What are Lissajous’ figures? Mention their uses.
  8. What are beats? Mention their applications.
  9. Explain piezo-electric effect.
  10. What is absorption co-efficient? Mention its unit.

 

SECTION – B

Answer any four questions.                                                               4×7.5 = 30 Marks

  1. Obtain an expression for the acceleration of a body rolling down an inclined plane.
  2. (a) Describe the working of venturimeter.
    • The diameter of the throat of a venturimeter is 0.05m. When it is inserted in a horizontal pipe line of diameter 0.1m, the pressure difference between the pipe and the throat equals 0.06m of water.  Calculate the rate of flow of water.
  3. Define the Hamiltonian. Obtain Hamilton’s canonical equations for a holonomic system.
  4. Describe Melde’s experiment to determine the frequency of a vibrator.
  5. Explain the production of ultrasonics by magnetostriction method.

 

 

 

 

SECTION-C

Answer any four questions.                                                               4×12.5 = 50 Marks

  1. (a) Derive an expression for the moment of inertia of a solid sphere about its diameter.

(b)        Find ratio of radius of gyration of a circular disc to that of circular ring of the same radius about the diameter.

  1. (a) Define centre of pressure.
  • Determine the position of centre of pressure for a triangular lamina of height h immersed vertically in a liquid with,
  • its vertex and

(ii)  its base in the surface of the liquid.

  1. Derive Lagrange’s equations of motion and apply them to the Atwood’s machine to find the

acceleration of the system.

  1. (a) Derive an expression for the velocity of longitudinal waves in a gas. Discuss Laplace’s correction.
  • The velocity of sound in air at 15˚C is 340m/s. What will it be when the pressure of the gas is doubled and its temperature is raised to 160˚C?
  1. Define reverberation time. Derive Sabine’s formula for the reverberation time.

 

 

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Loyola College B.Sc. Physics April 2008 Geo Physics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

FG 18

 

FIFTH SEMESTER – APRIL 2008

PH 5400 – GEO PHYSICS

 

 

 

Date : 03/05/2008                Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

PART-A                                                     10 X 2 = 20

Answer all questions

 

  1. What is meant by phases in seismic waves?
  2. What is a shadow zone?
  3. Give the significant differences between body wave and surface wave.
  4. Express Adams and Williamson equation for the variation of density with depth.
  5. Define the terms epicenter and focus of an earthquake.
  6. Write down the Laplace’s and Poisson’s equation obeyed by the gravitational potential.
  7. Explain briefly the Gauss method of determining the earth’s magnetic field.
  8. What are the prediction for the composition of the core from shock wave measurements?
  9. Give the decay schemes of the radio nuclide K40.

10 .List the two possible sources of heat within the earth.

 

 

PART-B                                                                4 X 7.5 = 30

Answer any four questions

 

  1. What are P and S waves? Describe the method by which the epicenter of an earthquake is located.
  2. Outline the principle and construction of the strain seismograph.
  3. Give an account of the Richter Scale of magnitude for earthquakes.
  4. Describe the quantitative investigation for an equation of state of the mantle
  5. Discuss the variation of temperature within the earth.

 

 

PART-C                                                            4 X 12.5 = 50

Answer any four questions

 

  1. Discuss the analogy between an optic wave and a seismic wave in terms of reflection

and refraction phenomenon.

  1. Obtain the Seismograph equation for a horizontal seismograph and deduce the two

types of instrumentation that follows the equation.

  1. Explain the working of i)Hammond and Faller method (of measuring gravity) and

ii)Worden gravitymeter with neat diagrams.(6+6.5)

  1. Explain the theory of i)saturation magnetometer and ii)Alkali vapour magnetometer(5+7.5)
  2. a) Discuss the flow of heat to the surface of the earth from the core.
  3. b) Discuss the source of heat within the earth.

 

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Loyola College B.Sc. Physics April 2008 Electricity & Magnetism Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

FG 45

 

FOURTH SEMESTER – APRIL 2008

PH 4500 – ELECTRICITY & MAGNETISM

 

 

 

Date : 26/04/2008                Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART A                                       (10 x 2m = 20 m)

ANSWER ALL THE QUESTIONS

 

  • State Gauss’s theorem of electrostatics.
  • Three parallel plate capacitors with capacitance values 1 μF, 2 μF and 3 μF are connected in series. Find the effective capacitance value.
  • What is Seebeck effect?
  • Write down the chemical reactions taking place at the plates of a Daniel cell.
  • What is a Helmholtz galvanometer?
  • Define mutual inductance of a coil.
  • Represent graphically the growth and decay of a current in an inductance coil when connected across a dc supply.
  • Explain the term ‘power factor’ of an ac circuit.
  • What is magnetic susceptibility and how is it related to magnetic permeability?
  • Give the expression for the Poynting vector. What does it signify?

 

PART B                                   (4 x 7 ½ m= 30 m)

ANSWER ANY FOUR QUESTIONS

 

  • Obtain an expression for the loss of energy in sharing of charges between two capacitors.
  • Explain the theory of determining the resistance of a coil using Carey Foster’s bridge.
  • Derive an expression for the magnetic field on the axis of a current carrying narrow circular coil.
  • Obtain an expression for the growth of charge in a capacitor when connected across a dc supply and a resistor.
  • Explain the domain theory of ferromagnetism.

 

PART C                                (4 x 12 ½ m = 50 m)

  ANSWER ANY FOUR QUESTIONS

 

  • Obtain expressions for potential and intensity of electric field due to an electric dipole.
  • Apply thermodynamics to a thermocouple to obtain expressions for Peltier and Thomson emfs.
  • Discuss the theory of moving coil galvanometer to find expression for the deflection in terms of current.
  • Discuss the mathematical theory of a LCR series ac circuit and obtain the condition for resonance.

20) Write down the Maxwell’s equations in source free region and prove that electromagnetic               wave travel in free space with the speed of light.

 

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Loyola College B.Sc. Physics April 2008 Electronics – II Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

FG 19

 

FIFTH SEMESTER – APRIL 2008

PH 5401 – ELECTRONICS – II

 

 

 

Date : 06/05/2008                Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

PART A

Answer all the questions                                 (10 x 2 = 20 marks)

 

  1. Give two characteristics of ideal op-amp
  2. What are hybrid integrated circuits?
  3. What is the advantage of R-2R ladder over weighted resistor D/A converter?
  4. Draw the circuit of a non-inverting amplifier
  5. What is virtual ground?
  6. What are the limitations of IC?
  7. What is the difference between SSI and VLSI chips?
  8. Distinguish between the instructions SUB B and CMP B
  9. What is the function of program counter?
  10. When will the auxiliary carry flag be set

 

 

PART B                                            (4 x 7.5 = 30 marks)

Answer any four questions

 

  1. Explain the construction of differentiator and integrator using op-amp
  1. With a neat diagram explain A/D conversion using voltage to frequency converter
  2. Explain the fabrication of monolithic IC
  3. Write an assembly language program for picking largest number in an array
  4. Explain memory write with bus timing diagram

 

PART C

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

 

  1. Explain the construction and theory of logarithmic amplifier
  2. Explain a) parallel A/D converter    (6)
  1. b) weighted resistor D/A converter
  1.  a) Compare bipolar and MOS technology   (6)
  1. b) Explain the IC fabrication of diode (6.5)

 

  1. Write the assembly language program for
    1. Multiplying two eight bit numbers
    2. Square root of a perfect square
  2. Explain the architecture of 8085 microprocessor

 

 

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Loyola College B.Sc. Physics April 2008 Mathematical Physics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

FG 24

 

SIXTH SEMESTER – APRIL 2008

PH 6604 / 6601 – MATHEMATICAL PHYSICS

 

 

 

Date : 21/04/2008                Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART – A

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

  1. Plot  for a fixed ‘r’ and .
  2. Find  a)     b) .
  3. Give the condition on a function f(z)=u(x,y) + i v(x,y) to be analytic.
  4. Evaluate along a straight line from i to 1+i.
  5. Write down the Lplace’s equation in two dimensions in polar coordinates.
  6. Write down the equation for one dimensional heat flow.
  7. State Parsavel’s theorem.
  8. Define Fourier cosine transform.
  9. Give trapezoidal formula for integration.
  10. Define the forward and backward difference operators.

PART – B

Answer any FOUR  questions.                                                                    (4 x 7\ = 30)

  1. Show that the following function  is harmonic and hence find the corresponding analytic function, .
  2. Prove Cauchy’s integral theorem.
  3. Find D’ Alembert’s solution of the vibrating string.
  4. State and prove convolution theorem in Fourier transform.   (2+5\=7\)
  5. Use Simpson’s 1/3 rule to find correct to two decimal places, taking step size h=0.25.

PART – C

Answer any FOUR   questions.                                                                   (14 x 12\ = 50)

  1. a) Determine  and plot its graph                                                           (3\)
  1. b) Perform the following operations i) ii) and locate these values in the complex plane. (4+5=9)
  1. a) State and prove Cauchy’s integral formula.
  1. b) Integrate in the counter clockwise sense around a circle of radius 1 with centre at z=1/2. (2+5+5\=12\)
  1. Derive the Laplace’s equation in two dimensions and obtain its solutions.
  2. Find the Fourier transform and the Fourier cosine transform of the function

.

  1. Estimate the value of f(22) and f(42) from the following data by Newton’s interpolation:
x 20 25 30 35 40 45
f(x) 354 332 291 260 231 204

 

 

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Loyola College B.Sc. Physics April 2008 Applied Electronics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

           B.Sc. DEGREE EXAMINATION – PHYSICS

FG 8

THIRD SEMESTER – APRIL 2008

PH 3106 – APPLIED ELECTRONICS

 

 

 

Date : 29-04-08                  Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

Part – A

Answer ALL Questions.                                                                                            (10×2=20)

  1. With neat Fermi diagrams explain what happens to the Fermi level when donors are added to an intrinsic semiconductor.
  2. Write a note on Light Emitting Diodes.
  3. State any four properties of an ideal Op-amp.
  4. With a neat diagram, explain how an Op-amp may be used as an integrator.
  5. What are don’t care states in K-maps?
  6. Simplify using Boolean identities.
  7. Discuss the racing condition in a JK flip-flop.
  8. Draw the circuit diagram of a three bit ring counter.
  9. Write a note on the registers of the processor.
  10. Write a note on the memory hierarchy in a computer.

Part – B

Answer any FOUR.                                                                                                   (4×7.5=30)

  1. With neat diagrams explain the working of common emitter and common base transistor amplifiers.
  2. With a neat diagram, explain the working of a four bit binary weighted D/A convertor.
  3. With neat diagrams explain how NAND gates may be used as universal building blocks.
  4. With a neat diagram explain the working of an RS flip-flop.
  5. Write notes on Cache and Virtual memories of a computer.

Part – C

Answer any FOUR.                                                                                                   (4×12.5=50)

  1. With a plot of the volt-ampere characteristics of a zener diode, explain how it may be used as a voltage regulator.
  2. With neat diagrams, explain the working of a four bit counter A/D converter.
  3. With circuit neat diagrams, explain the working of a full adder and a half subtractor.    (7+5.5)
  4. With neat circuit and wave diagrams explain the working of a four bit ripple counter.
  5. Write notes on RAM, ROM, EEPROM, UVEPROM. (3+3+3+3.5)

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Loyola College B.Sc. Physics April 2008 Atomic & Nuclear Physics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

           B.Sc. DEGREE EXAMINATION – PHYSICS

FG 21

FIFTH SEMESTER – APRIL 2008

PH 5500 – ATOMIC & NUCLEAR PHYSICS

 

 

 

Date : 28-04-08                  Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

PART-A

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

  1. What are the limitations of Thomson’s parabola method?
  2. Write down the electronic configuration of Na and Cl.
  3. What is photo electric effect?
  4. Calculate the work function of sodium in eV, given threshold wavelength is 6800Å.
  5. Explain the terms: (i) Isotone              (ii) Isomer
  6. Calculate the binding energy in Mev of deutron.

Given:             Mass of  & mass of amu.

and mass of amu.

  1. Why are neutrons moderated in nuclear reactors?
  2. What are magic numbers?
  3. What are cosmic rays?
  4. Mention any two properties of nuclear forces.

 

PART-B

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

  1. Describe Franck-Hertz experiment for determining the critical potentials.
  2. Describe L-S and J-J coupling schemes.                                 –(4+3.5)
  3. a) Mention any five properties of gamma rays.                      –(5)
  1. b) Alpha particles from polorium travel along a semicircle of radius 20cm in a magnetic field of 1.763 wb/m2. Find the velocity and energy of the particles. e/m of and mass of
  1. Give an account of any three sources of neutron.                  –(3×2.5)
  2. a) Explain Yukawa’s meson theory of nuclear forces.           –(4)
  1. b) How does the intensity of cosmic ray varies with attitude? –(3.5)

 

PART-C

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

  1. a) Explain the principle and experimental arrangement of stern-Gerlach in support of spatial quantisation.                                                             —(4+6)
  1. b) Why it is necessary to use a beam of neutral atoms and not of ions in this experiment? —(2.5)
  1. a) Derive an expression for the change in wavelength of a pholon in complon scattering.    —(9)
  1. b) Pholon of energy 1.02 MeV undergoes Compton scattering through 1800.Calculate the wavelength of scattered pholon. —(3.5)
  1. a) Give the origin of the B-ray line and continuous spectrum. —(5+5)
  1. b) Calculate the binding energy of a neutron in the

and .                                    —-(2.5)

  1. a) Derive the four factor formula for a thermal nuclear reactor. —(9.5)
  1. b) Calculate the energy released when 1 kg of U235 undegoes nuclear fission. Assume energy per fission is 200 MeV. —(3)
  1. Obtain an expression for binding energy of a nucleus based on the semi-empirical mass formula

—-(12.5)

 

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Loyola College B.Sc. Physics Nov 2008 Thermodynamics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

CC 08

 

THIRD SEMESTER – November 2008

PH 3503 – THERMODYNAMICS

 

 

 

Date : 08-11-08                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

 

SECTION-A

Answer ALL the questions                                               (10×2=20)

 

  1. State the principle of equipartition of energy.
  2. Define Brownian Motion.
  3. Define the heat capacity of a substance.
  4. Given C V of an ideal gas is 2R, where R is the gas constant.

Determine the adiabatic exponent g = C P / CV.

  1. Define intensive variables and give examples.
  2. 6 J of heat is supplied to a system and the internal energy of the

system decreases by 3 J. Find the work done.

  1. Write down the Gibbs – Helmholtz equation.
  2. Define phase transition. Give an example.
  3. Define thermodynamic probability.
  4. State Wein’s displacement law.

 

SECTION-B

Answer Any Four questions.                                            (4×7.5=30)

 

11) (a) Define mean free path. [2]

(b) Obtain an expression for the mean free path. State your

assumptions clearly. [5.5]

12) Explain the process of liquefying hydrogen.

13) From the first law of thermodynamics, obtain the relation:

                                P  P

14) Obtain the Maxwell’s thermodynamic relations.

15) (a) Define microstates and macrostates. [3]

(b) How will you distribute 3 particles among 4 states under

Maxwell-Boltzmann and Bose-Einstein statistics? [4.5]

 

SECTION-C

Answer Any Four questions                                             (4×12.5=50)

 

16) Discuss Langevin’s theory of Brownian motion.

17) (a) Discuss Clement-Desormes method to determine the ratio of

specific heats. [8]

(b) Describe the properties of He I and He II [4.5]

18) (a) Obtain the Clausius inequality. [8.5]

(b) Calculate the entropy change when 5 Kg of water is heated from

to  . Assume that the specific heat capacity has a

Constant value of 4200 J/Kg-K. [4]

19) Explain Joule-Kelvin effect. Obtain an expression for the Joule-Kelvin

coefficient. Discuss the significance of the various terms in it.

20) Obtain the Bose-Einstein distribution for an ideal Bose gas. State the

various assumptions made.

 

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Loyola College B.Sc. Physics Nov 2008 Properties Of Matter & Acoustics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PHYSICS

CC 02

 

FIRST SEMESTER – November 2008

PH 1501 – PROPERTIES OF MATTER & ACOUSTICS

 

 

 

Date : 10-11-08                     Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

PART-A

 

Answer ALL questions:                                                          10 x 2 = 20 marks

 

  1. State Hooke’s law of elasticity.
  2. Define Poisson’s ratio. What are the theoretical limits of its value?
  3. Differentiate streamlined motion from turbulent motion
  4. Give two properties of a good lubricant
  5. Define surface tension of a liquid Give it’s unit.
  6. Calculate the excess pressure inside an air bubble of diameter 0.2 mm which is surrounded on all sides by water of surface tension 0.07 N/m
  7. What are beats?
  8. What is Piezo electric effect ?
  9. Define reverberation time..
  10. State the principle of superposition.

 

PART-B

Answer any FOUR questions:                                                4 x 7.5 = 30 marks

 

  1. Calculate the bending moment for a beam of cross sectional area ‘A’, which forms part of a circle of radius ‘R’. The Young’s modulus of the material of the beam is ‘q’.
  2. Describe the working of a mercury diffusion pump.
  3. Describe the Jaeger’s method for determining the surface tension of a liquid.
  4. Find the reflection and transmission amplitude coefficient for a transverse wave at the boundary of two strings.
  5. What are ultrasonic waves?, How are they produced using a magnetostriction oscillator.

PART-C

Answer any FOUR questions:                                                4 x 12.5 = 50 marks

 

  1. a). Calculate the torsional couple required to twist a wire through an angle ‘ q’

b). If a circular disc of moment of inertia ‘I’ is suspended at the end of the wire of length

‘l’, calculate the time period of oscillations and  hence the rigidity modulus of the

material of the wire.

 

 

 

 

 

  1. a) Describe the Rankine’s method to determine the viscosity of a given gas.

b). Olive oil in a tall cylinder is made to flow through a horizontal capillary tube

connected to the cylinder 50 cm below the surface of the liquid. If the tube is 10 cm

long and 2mm in diameter how much oil will flow through in 20 second?, Density of

olive oil is 0.918 gm/cc ; viscosity of olive oil is 0.08 Ns/m2

18  a). Calculate the work done in increasing the radius of a spherical soap bubble from

1cm to 5 cm. Surface tension of soap solution is 0.028 N/m.

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

mercury.

  1. a). What is Doppler effect? Derive the formula for the change in frequency (i) When the

source is moving towards the stationary observer. (ii) When the source is moving

away from stationary observer. (iii) When the observer is moving towards the

stationary source. (Iv) When the observer is moving away from the source.

b). Find the vibrating length of the wire if it vibrates at 50 Hz subjected to a tension of

1 Newton. The linear density of the wire is 1.53 x 10-3 kg/m.

  1. a). Define the absorption coefficient of sound wars for material.

b). How is it determined experimentally?

c). Give the conditions for good acoustics in an auditorium.

 

 

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Loyola College B.Sc. Physics Nov 2008 Prop.Of Mat.& Thermal Physics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

 

CC 01

 

FIRST SEMESTER – November 2008

PH 1500 – PROP.OF MAT.& THERMAL PHYSICS

 

 

 

Date : 12-11-08                       Dept. No.                                          Max. : 100 Marks

Time : 1:00 – 4:00

PART – A

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

 

  1. What is an equipotential surface? What is the amount of work done in moving a mass between two points of an equipotential surface?
  2. Define the term neutral axis and internal bending moment.
  3. Water flows through a horizontal capillary tube of 1mm internal diameter and length 50cm under pressure of a column of water 30cm in height. Find the volume  rate of  flow of water. Viscosity of water is 10-3 Ns/m2 .
  4. What is surface tension? Mention its dimension.
  5. Calculate the diameter of a gas molecule, given that the mean free path is 3×10-5 cm and the number of molecules per cc is 3×1019 .
  6. State two examples of transport phenomena.
  7. What is a quasistatic process?
  8. Calculate the change in entropy when 0.02kg of ice at 0C is melted into water at the same temperature.
  9. What is an ideal gas?
  1. How is the boiling point of a liquid affected by the change in pressure?

 

PART B

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

 

  1. Explain the terms i) gravitational field, ii) gravitational potential and iii) gravitational

potential energy.

  1. a) Show that the excess of pressure inside a soap bubble is 4T/R.          (5)
  2. b) Calculate the excess pressure inside a soap bubble of radius 3×10-3 Surface tension

of soap solution is 0.02N/m.                                                                                                      (2.5)

  1. Derive an expression for the pressure of a gas on the basis of kinetic theory of gases.
  2. Show that the total change in entropy in a reversible process is zero.
  3. Derive an expression for Joule-Kelvin coefficient.

 

PART C

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

 

  1. Define a cantilever. Obtain the expressions for the depressions produced at the free end of a
  2. i) light and   ii) heavy cantilever.                                                                                          (2.5+5+5)
  3. Describe with relevant theory the Quincke’s method for the determination of i)surface

tension and   ii)angle of contact of mercury.                                                                          (4.5+4+4)

  1. Define coefficient of viscosity. Derive an expression for the coefficient of viscosity on the

basis of kinetic theory of gases.                                                                                             (2.5+10)

  1. Derive Maxwell’s thermodynamical relations.
  2. a)Derive the i)first and ii) second latent heat equations.                   (5+5)

b)Discuss the effect of change of pressure on the melting point of substances.                          (2.5)

 

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Loyola College B.Sc. Physics Nov 2008 Optics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PHYSICS

CC 11

 

FIFTH SEMESTER – November 2008

PH 5506 – OPTICS

 

 

 

Date : 07-11-08                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART – A              

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

 

  1. What are unit planes ?
  2. Give the condition for achromatic combination of lenses.
  3. Calculate the separation between the coherent sources formed by a

biprism whose inclined faces make angles of 20  with its base, the slit

being .1m away from the biprism. (Refractive index of prism material =

1.5)

  1. How optical planeness of a surface is tested ?
  2. Distinguish between Fresnel and Fraunhoffer diffraction.
  3. What are missing orders in double slit experiment ?
  4. State Brewster’s law.
  5. Calculate the thickness of a half-wave plate for light of wavelength

580nm. Principal refractive indices are    = 1.544 and    =1.553.

  1. What is optical pumping ?
  2. What is Stimulated Raman scattering ?

 

PART – B

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

 

  1. Define dispersive power of a prism. Derive the Condition for

dispersion without deviation.

  1. Discuss the formation of colours in thin films due to reflected light.
  2. Describe the Fresnel’s diffraction at a straight edge.
  3. Explain how Nicol prism can be used as an analyzer.
  4. Define Einstein’s coefficients and derive the relation between them.

 

PART – C

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

 

  1. a) Discuss the effect of refraction on a ray of light by the matrix method.               (6.5)
  2. b) Describe the Construction and working of Huygen’s eye piece.                             (6)
  3. Describe Michelson’s interferometer with the help of line diagram.

Explain how  the wavelength of monochromatic light is measured using this.

  1. Discuss the theory of diffraction grating. Obtain an expression for resolving power of a

grating.

  1. a) With necessary theory explain the Construction and working of a Laurent’s half shade

Polarimeter.                                                                                                                (9)

  1. b) A glucose solution of unknown Concentration is contained in a 12cm long tube and

seen to rotate linearly polarized light by 2.5 If the specific rotation of  glucose is 52

find the Concentration of a solution.                                                                                           (3.5)

  1. With a neat diagram explain the working of a ruby laser.

 

 

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Loyola College B.Sc. Physics Nov 2008 Optics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PHYSICS

CC 06

 

THIRD SEMESTER – November 2008

PH 3500 – OPTICS

 

 

 

Date : 06-11-08                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART – A

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

  1. What are principal points and principal planes?
  2. Two lenses of focal lengths 8 cm and 6 cm are placed at a certain distance apart. Calculate the

distance between the lenses if they form an achromatic combination.

  1. Explain the formation of colours in thin film.
  2. Light of wavelength 6000 Å falls normally on a thin wedge shaped film of µ=1.5, forming

fringes  that are 2mm apart. Find the angle of the wedge.

  1. Draw the intensity distribution diagram in the Fraunhofer type of diffraction

produced by two nearby parallel narrow slits illuminated by  monochromatic light.

  1. Calculate the aperture of the objective of a telescope which may be used to resolve stars

separated by 4.88×10-6 radians for light of λ=6000 Å.

  1. State Malus law.
  2. A sugar solution in a tube of length 20cm rotates the plane of polarization of light by 35°. If

the specific rotation of the sugar is 66.5°, calculate the concentration of the solution.

  1. Distinguish between spontaneous and stimulated emission of radiation.
  2. What is the role of an optical resonator in a laser device?

 

PART – B

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

 

  1. Construct the translation matrix for paraxial rays using Matrix method.
  2. How is the refractive index of a liquid determined by forming Newton’s rings?
  3. Obtain an expression for the resolving power of a plane diffraction grating.
  4. a)Describe the construction and working of a half-wave plate. (5 marks)

b)Calculate the thickness of a quarter wave plate of quartz for light of  wavelength 5090Å.       Given µe=1.553 and µo =1.544.                                                                            (2.5 marks)

  1. Describe the construction and working of a Ruby laser.

PART – C

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

 

  1. Explain how spherical aberration arises and discuss the various methods of minimizing it.
  2. Describe in detail how the wavelength of monochromatic light is found using Fresnel’s

biprism.

  1. Give an account of the phenomenon of diffraction and the relevant theory of diffraction due

to a straight edge.

  1. a)Give Huygen’s explanation of double refraction.                          (4.5marks)

b)With diagrams illustrate the wave surfaces in calcite when the optic axis is parallel to

the crystal surface and perpendicular to the plane of incidence.                          (8 marks)

  1. a)Define Einstein’s coefficients and deduce an expression connecting them. (9 marks)

b)Explain how population inversion is achieved in He-Ne laser.                         (3.5 marks)

 

 

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Loyola College B.Sc. Physics Nov 2008 Mathematics For Physics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

 

AB 03

 

THIRD SEMESTER – November 2008

MT 3102/MT 3100 – MATHEMATICS FOR PHYSICS

 

 

 

Date : 11-11-08                       Dept. No.                                          Max. : 100 Marks

Time : 9:00 – 12:00

Section A

Answer ALL questions:                                                                                                  (10 x 2 = 20)

  1. If   then show that .
  2. Prove that the subtangent to the curve  is of constant length.

 

  1. Show that

 

  1. Find the rank of the matrix .
  2. Find .
  1. Find .
  2. Write the expansion of tan nq in terms of tanq.
  3. Prove that cosh2x – sinh2x = 1.
  4. A bag contains 3 red, 6 white, 7 blue balls. What is probability that two balls drawn are white and blue balls?
  5. A Poisson variate X is such that 2 P(X = 1) = 2P(X =2). Find the mean.

 

Section B

Answer any FIVE questions:                                                                                       (5 x 8 = 40)

  1. Find the derivative of .
  2. Find the maxima and minima of .
  3. Prove that .
  4. Find .
  5. Ifprove that .
  6. Expand in terms of cosq.
  7. Find the mean and standard deviation for the following data:

 

Years under 10 20 30 40 50 60
No. of people 15 32 51 78 97 109
  1. X is normally distributed with mean 12 and standard deviation 4. Find the probability of the following:

(i)            X ³ 20             (ii)  X £ 20             (iii) 0 £ X £ 12.

given that z2.0 = 0. 4772, z3.0 = 0. 4987, z4.0 = 0. 4999.

 

Section C

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

 

  1. (a) Find the sum of the series to infinity:

(b) If   then prove that  and hence prove .                                          (10 +10) 

 

  1. (a) Find the characteristic roots and characteristic vectors of the matrix

.

(b)  Verify Cayley Hamilton Theorem for matrix .

(12+8)

  1. (a) Find the Laplace transform of

 

(b) Using Laplace transform, solve the equation y¢¢ + 2y¢ – 3y = sin t, given that y = y¢ = 0 when t = 0.

(8+ 12)

  1. (a) Expand sin3qcos5q in a series of sines of multiplies of q.

 

(b) In the long run 3 vessels out of every 100 are sunk. If 10 vessels are out, what is

the probability that (i) exactly 6 will arrive safely.  (ii) at least 6 will arrive safely.

(10 +10)

 

 

 

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Loyola College B.Sc. Physics Nov 2008 Electronics – I Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PHYSICS

CC 07

 

THIRD SEMESTER – November 2008

PH 3502 – ELECTRONICS – I

 

 

 

Date : 06-11-08                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

PART – A (10 x 2 = 20)

Answer ALL questions

  1. What is a current source?
  2. State maximum power transfer theorem.
  3. What is quiescent (Q) point?
  4. Mention any two uses of a Bistable multivibtator.
  5. Mention the characteristic features of OP-AMP.
  6. Draw the circuit of OP-AMP summing amplifier for four input.
  7. What is k-map?
  8. Draw the logic circuit for clocked RS flip-flop and give its truth table.
  9. What is a register?
  10. What are the difference between ROM and RAM?

PART – B (4 x 7.5 = 30)

Answer any FOUR questions

  1. State and prove Norton’s theorem.
  2. With necessary circuit explain the fixed bias circuit and derive the equation for its stability.
  3. Draw the inverting Op-Amp circuit and derive the equation for its ideal closed loop gain.
  4. Write a note on multiplexing and demultiplexing.
  5. Explain the function of a decade counter with logic circuit and truth table.

PART – C (4 x 12.5 = 50)

Answer any FOUR questions

  1. The h-parameters of a transistor in CE configuration are h fe=330, h ie=4.5 kilo ohm, h re=0.0002 and h oe=0.000030 mho, if the load resistance is 5 kilo-ohm and the internal resistance of the signal source is 10 kilo-ohm, then, calculate the values of current gain, input impedance, voltage gain, output admittance, out put impedance and power gain.
  2. Explain the function of a phase-shift oscillator using three RC sections with necessary diagram. Obtain the expressions for the conditions of oscillation and arrive at its frequency expression.
  3. Explain the construction, working and output characteristics of a FET.
  4. Explain the function of a JK master-slave flip-flop with logic diagram and truth-table.
  5. Explain the function of a 4-bit ripple counter with necessary circuit diagram, truth-table and

waves form.

 

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Loyola College B.Sc. Physics Nov 2008 Electricity & Magnetism Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

CC 10

 

FIFTH SEMESTER – November 2008

PH 5505 – ELECTRICITY & MAGNETISM

 

 

 

Date : 05-11-08                       Dept. No.                                          Max. : 100 Marks

Time : 9:00 – 12:00

SECTION – A

Answer ALL the questions.                                                                                         (10×2 = 20 Marks)

 

  1. Calculate the electric intensity required to just support a water droplet of mass

10-9 kg having a charge of 4.9 × 10-12 coulomb.

  1. What is meant by dielectric constant of a medium?
  2. Define thermoelectric power. What is a thermo – electric diagram?
  3. State Faraday’s laws of electrolysis.
  4. State Ampere’s circuital law.
  5. Calculate the self-inductance of a 1 metre long solenoid of 400 turns and 5 cm diameter.
  6. What do you understand by the time constant of a circuit containing inductance and resistance?
  7. Why is a choke coil preferred to a resistor in an ac circuit?
  8. What is meant by hysteresis?
  9. What is Poynting vector? Give its significance.

SECTION – B

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

  1. Derive an expression for the capacity of a parallel plate capacitor. What will be the capacity if the space between the plates is partially filled with a slab of thickness t and dielectric constant εr?
  2. Explain, with necessary theory, how a Carey-Foster bridge is used to determine the resistance of a coil of wire.
  3. Discuss the theory of Helmholtz double coil galvanometer.
  4. Discuss the theory of a  parallel resonant circuit. Mention its use.
  5. Give an account of Maxwell’s equations. What is the significance of displacement current?

 

SECTION – C

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

  1. State and prove Gauss’s law in electrostatics. Apply it to find the electric intensity inside and outside a uniformly charged sphere.

 

  1. (a) Show that  π= TdE/dT and (ii) d/dT (π/T)+(σa-σb)/T=0                                          (10.5 marks)

(b)   The emf (micro volts) in a thermocouple, one junction of which is at

0˚C is given by E=1788t – 3t2 where t is temperature in degree celcius.

Find the neutral temperature.                                                                                (2 marks)

  1. (a) Define coefficient of mutual induction between a given pair of coils.

Describe, with necessary theory, a method of finding it experimentally.                         (10.5 marks)

(b)  A straight solenoid has 60 turns per cm in the primary and 300 turns in the secondary .

The area of cross – section of the solenoid is 5cm2. Calculate the mutual inductance.                  (2marks)

  1. Discuss the theory of oscillatory discharge of a capacitor through an inductance and a resistance.

 

  1. Explain clearly dia, para and ferromagnetism.

 

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Loyola College B.Sc. Physics Nov 2008 Atomic And Nuclear Physics Question Paper PDF Download

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS

CC 09

 

FIFTH SEMESTER – November 2008

PH 5504 – ATOMIC AND NUCLEAR PHYSICS

 

 

 

Date : 03-11-08                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

SECTION – A

Answer All the questions.                                                                                           (10×2 = 20 Marks)

  1. State and explain Pauli’s exclusion principle.
  2. What is meant by spin-orbit interaction?
  3. What are isobars? Give an example.
  4. State Geiger – Nuttal law.
  5. Explain briefly cross-section of reactions.
  6. What do you know about the magnetic moment of a neutron?
  7. What are hard and soft components of cosmic rays?
  8. What are Hyperons?
  9. What is meant by Nuclear Magnetic Resonance?
  10. Define Relaxation time with respect to nuclear spin energy.

 

SECTION – B

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

 

  1. Describe Dunnigton’s method for the determination of e/m of electron.
  2. (a). Define: (i) Mass defect, (ii) Binding energy and  (iii) Packing fraction.            (4.5 marks)

 

(b) The masses of the hydrogen atom and of neutron are 1.008142 and 1.008982

amu respectively. Calculate the binding energy and packing fraction per nucleon

of  16O nucleus if its atomic mass is 15.994915 amu.                                         (3 marks)

 

  1. (a). Explain nuclear fission and chain reaction?                                     (51/2 marks)

(b). When a U-235 nucleus undergoes fission, 200 MeV energy is released. How much energy

in joules will be released when 1 g of U –235 is fissioned?                                          (2 marks)

 

  1. What are cosmic ray showers? Discuss qualitatively the mechanism of their origin.
  2. What is Mössbauer effect? Explain the experimental arrangement to study Mössbauer effect.

 

SECTION – C

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

  1. (a) What is Compton effect? Derive an expression for the change in wavelength of the scattered

photon using quantum theory.                                                                              (10.5 marks)

(b)  Calculate the Compton wavelength.                                                                     (2 marks)

  1. (a) Give an account of the β – ray spectrum. Explain the neutrino hypothesis to understand the spectrum.                                                 (10 marks)

(b) Explain inverse β – decay.                                                                                      (2.5 marks)

  1. How was neutron discovered? Give an account of its properties and also production and detection techniques.
  2. Describe the liquid drop model of the nucleus. Obtain an expression for the binding energy of a nucleus on the basis of semi-empirical mass formula of Weizsäcker.
  3. Explain, in detail, the characteristics of NMR spectra.

 

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