LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

FG 44

SECOND SEMESTER – APRIL 2008

PH 2100 / 3102 – PHYSICS FOR CHEMISTRY

 

 

 

Date : 25/04/2008                Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

PART A ( 20 MARKS)

ANSWER ALL QUESTIONS                                                          10 X 2 = 20

 

1. When is a periodic motion said to be simple harmonic ?
2. Define angular momentum. Give it’s unit.
3. What is meant by parking orbit ?
4. State the principle of equivalence.
5. State Hooke’s law.
6. Define surface tension. Give it’s unit.
7. State Heisenberg’s uncertainty principle.
8. Write down the time dependent Schrodinger equation.
9. Distinguish between loudness and intensity.
10. What are overtones ?

 

 

PART B (30 MARKS )

ANSWER ANY FOUR QUESTIONS.                                4 X 7.5  = 30

 

1. Show that the oscillations of a liquid in a U tube are simple harmonic and find the time period.
2. State and explain Kepler’s laws.
3. Obtain an expression for the excess pressure over the curved surface of a liquid.
4. Derive the time independent Schrodinger equation. How is the wave function interpreted ?
5. What are beats ? Discuss any one application.

 

PART C ( 50 MARKS )

 

ANSWER ANY FOUR QUESTIONS.                                4 X 12.5 = 50

 

16.(a) Derive an expression for the acceleration of a solid sphere rolling down an inclined plane                       without slipping

(b) A particle executing simple harmonic motion in a straight line makes 120 complete oscillations            in 1 minute and its maximum velocity is 6∏ m/s .Find the length of the path and the maximum            acceleration.

17. (a) Describe an experiment to measure the gravitation constant.

(b) Determine the escape velocity for the earth.( Radius of the earth is 6400 km and value of g at             the earth’s surface is 9.8 m/s² )

18. (a) Derive a relation between the three elastic modulii.

(b) Define Poisson ratio. What are the limits for this ratio?

19. Describe the experiment of Davisson and Germer and discuss the results.
20. Derive an expression for the velocity of transverse waves in a stretched string. Use this to explain       the laws of transverse vibrations of a stretched string.

 

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

RO 31

SECOND SEMESTER – APRIL 2008

PH 2103 – PHYSICS FOR CHEMISTRY

 

 

 

Date : 25/04/2008                Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

SECTION – A

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

 

1. What are holonomic and non-holonomic constraints?
2. Sketch the displacement – time graph and velocity – time graph.
3. What is meant by parking orbit for a satellite?
4. State the Principle of equivalence of the general theory of relativity.
5. Define surface tension and give its unit.
6. Calculate the rigidity modulus and Poisson’s ratio for silver.

(Given, Young¢s modulus = 7.25 x 10¹⁰ N/m² and bulk modulus = 11 x 10¹⁰ N/m²)

1. What are optically active materials? Give two examples.
2. In Fraunhoffer diffraction pattern due to a narrow slit, a screen is placed 2m away from the lens to obtain the pattern. If the slit width is 0.2 mm and the first minima lies 5 mm on either sides of the central maximum, find the wavelength of light.
3. Define unit cell.
4. Define lattice and basis.

 

SECTION – B

Answer any Four questions                                                             (4 x 7.5 = 30 Marks)

 

1. Obtain expressions for time of flight, greatest height and range of a projectile motion.
2. Discuss qualitatively any two experimental tests of general theory of relativity.
3. Obtain an expression for the excess of pressure inside

• a spherical soap bubble
• a spherical liquid drop

 

1. Explain the use of a plane transmission grating to measure wavelength of a spectral line.
2. State Bragg’s law. Explain the Laue method of X-ray diffraction.

 

SECTION – C

 

Answer any Four questions                                                 (4 x 12.5 = 50 Marks)

 

1. Set up the Lagrangian and solve the Lagrange’s equation of motion for

1. Atwood’s machine  (6 marks)
2. Simple pendulum (6 ½ marks)

1. a) Describe an accurate method of determining the value of the gravitational constant G.

1. b) Assuming the mean density of the earth as 5500 Kg/m³ and that the earth’s radius as 6400 km, find a value for the acceleration of free fall at the earth’s surface. Derive the formula used.

(G = 6.7 x 10^-11 Nm² Kg^-2)                                                    (7 + 2 ½ + 3 marks)

1. Describe Quincke’s Method of finding surface tension. Derive the formula employed.
2. Explain the production and detection of

• Plane polarized light (3 ½ Marks)
• Circularly polarized light (4 ½ Marks)
• Elliptically polarized light (4 ½ Marks)

1. Write about Miller indices. Explain the body centered cubic and face centered cubic crystal structures.

 

 

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

FG 9

THIRD SEMESTER – APRIL 2008

PH 3202 / 3200 – PHYSICS FOR CHEMISTRY – II

 

 

 

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

Time : 1:00 – 4:00

PART-A

 

Answer all questions                                                                                            10×2=20marks

1. What are flip flops?
2. What is the difference between full and half adder.
3. State Pauli’s exclusion principle.
4. Give any two industrial applications of x-rays.
5. Calculate the binding energy of a Deutron. Given ₁P¹=1.0081amu, ₀n¹=1.00893amu,

₁H²=2.01473amu.

6. Describe Proton and Neutron using quark model.
7. State the laws of transverse vibrations of strings.
8. Mention two properties of ultra sonic waves.
9. State Heisenberg’s uncertainty principle.
10. Mention two situations where classical mechanics fails.

 

PART-B

Answer any four questions                                                                               4×7.5=30marks

 

11. Explain the working of a 3 bit counter using flip flops.
12. Explain the main aspects of photo electric effect using Einstein’s equation.
13. What are elementary particles? How they are classified?
14. How will you determine the velocity of sound waves in gas?
15. Obtain the energy of a particle in a one dimensional box.

 

PART-C

Answer any four questions                                                                               4×12.5=50marks

16. Explain the truth table of a full adder with a neat circuit.
17. State the postulates of Bohr atom model. Obtain expressions for the radius and energy of

the n^th orbit.

 

18. Explain semi empirical mass formula for the binding energy of the nucleus.
19. a) Explain how ultra sonic waves are generated by using piezo electric effect? (9.5)
20. b) Mention any two uses of ultra sonic waves. (3)
21. a) With relevant theory, explain Davison and Germer experiment for diffraction of

electrons.(10)

 

1. b) Calculate De Broglie wave length of an electron accelerated through a potential of

150 volts.(2.5)

 

 

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION –  CHEMISTRY

THIRD SEMESTER – NOVEMBER 2010

PH 3202 – PHYSICS FOR CHEMISTRY – II

 

 

 

Date : 12-11-10                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART-A

Answer all the questions.                                                                                          10×2=20

1. Subtract the given binary numbers by 2’s complement method, 10001 – 01110
2. State De-Morgan’s law.
3. What is photoelectric effect?
4. State Pauli’s exclusion principle.
5. What is mass defect?
6. What is inverse Piezo-electric effect.
7. What are elementary particles?
8. A microscope, using photons, is employed to locate an electron in an atom to within a distance of 0.2Ǻ. What is the uncertainty in the momentum of the electron located in this way?
9. Mention any two factors that affect the acoustics of a building.
10. What are matter waves?

PART-B

Answer any four questions.                                                                                     4×7.5=30

11. With a neat circuit diagram and truth table explain full binary adder.
12. Describe Millikan’s experiment to verify the Einstein’s photo electric equation.
13. Obtain the Newton’s formula of velocity of sound.
14. Describe the liquid drop model of the nucleus.
15. Derive Schrodienger time dependent wave equation from the fundamental wave equation.

PART-C

Answer any four questions                                                                                      4 x12.5=50

16. a) What is Karnaugh map (K map) method? (2)
17. b) Simplify the Boolean function F(A,B,C,D) = ∑(0,1,2,4,5,10,11,14,15) using K-map. Design a logic circuit of the simplified equation. (7.5+3)
18. a) State the postulates of Bohr’s atom model.                   (2.5)
19. b) Obtain expressions for the radius and electron energy of the nth orbit. (10)
20. a) State Sabine’s law (2.5)
21. b) Derive the expression for reverberation time from Sabine’s law (10)
22. Describe the Davisson and Germer experiment for the study of electron diffraction.
23. Give a detailed account of the general properties of a nucleus.

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

THIRD SEMESTER – APRIL 2012

PH 3202 – PHYSICS FOR CHEMISTRY – II

 

 

 

Date : 02-05-2012              Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART – A

Answer ALL questions:                                                                                                              (10×2=20)

 

1. Convert the given decimal number into binary number 56.42.
2. State Demorgan’s theorem.
3. What is photoelectric effect?
4. State Pauli’s exclusion principle.
5. Write any two general properties of nucleus.
6. What are elementary particles?
7. Define absorption coefficient of material.
8. What are the two types of sound waves?
9. State Heisenberg’s uncertainty principle.
10. What is box normalization of wave system?

 

PART – B

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

 

11. Simplify the given Boolean function using K-map F(A,B,C,D)=∑(0,2,5,7,8,10,13,15)
12. Discuss about different types of photoelectric cells.
13. Explain nuclear fission reaction by using liquid drop model.
14. Describe the production of ultrasonic sound waves by Piezo-electric method.
15. Derive Schrödinger time dependent wave equation from the fundamental wave equation.

 

PART – C

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

 

16. With a logic circuit and truth table describe the working of a JK flip-flop.
17. a) State the postulates of Bhor atom model (2.5)
18. b) Obtain the expression for the radius and electron energy of the nth orbit.    (10)
19. a) Write the semi-empirical mass formula to calculate the binding energy of the nucleus and explain each term in it. (10)
20. b) Draw a graph of binding energy per nucleon versus mass number. (2.5)
21. Derive an expression of reverberation time from Sabine’s law.
22. a) Find the de-Broglie wave length associated with a 46gm golf ball with velocity 36m/s. (2.5)
23. b) Describe Davisson and Germer experiment for the study of electron diffraction. (10)

 

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

SECOND SEMESTER – APRIL 2012

PH 2103/2100 – PHYSICS FOR CHEMISTRY – I

 

 

 

Date : 23-04-2012              Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

 

PART – A

Answer ALL questions:                                                                                                                (10×2=20)

1. What are generalised coordinates?
2. Define the term velocity. Write its unit.
3. Write Newton’s law of gravitation.
4. Write the principle of equivalence in gravitation.
5. Write Hook’s law.
6. Define surface tension of a liquid.
7. What is a polaroid?
8. Differentiate between Fresnel and Fraunhofer diffraction.
9. Define unit cell.
10. What is the significance of Miller indices?

 

PART – B

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

11. Explain the significance of velocity- time graph of a moving body.
12. (i)Two bodies of mass 10kg and 25kg are placed at a distance of 0.2m apart. Find the force between them. G = 6067×10^-11 S.I. units. (4.5)

(ii) Define parking orbit.                                                  (3)

13. Discuss the atomic arrangement in a sodium chloride crystal .
14. Briefly explain circular and elliptical polarization.
15. Write in detail, the molecular theory of surface tension.

 

PART – C

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

 

16. Derive Lagrange’s equation for a simple pendulum.
17. (i)Write Kepler’s laws of planetary motion

(ii)What is escape velocity? Derive the expression for the escape velocity of a body.

18. Derive Poiseuille’s formula for the flow of liquid through a capillary tube.
19. Explain Bragg’s experiment of X-ray diffraction and arrive at Bragg’s law..
20. Explain in detail, Fraunhofer diffraction at a single slit and arrive at the expression for the secondary maxima.

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

THIRD SEMESTER – NOVEMBER 2012

PH 3202 – PHYSICS FOR CHEMISTRY – II

 

 

Date : 09/11/2012             Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

PART – A

Answer ALL questions:                                                                                                         (10×2=20)

1. Find the compliment of (A + B)(B + C)(C + A)
2. What are shift registers?
3. State Pauli’s exclusion principle.
4. Mention any two applications of X – rays
5. What is Bohr magneton?
6. Write down the semi – empirical mass formula.
7. What is the effect of humidity on the velocity of sound?
8. Distinguish between reverberation and echo.
9. Find the de Broglie wave length associated with a thermal neutron at room temperature 37^oC? k = 1.38 x 10^-23JK^-1 and h = 6.63 x 10^-34J s^-1
10. Write down the Schrodinger wave equation of a particle moving through a potential V = kx²

PART – B

Answer any FOUR questions                                                                                                (4×7.5=30)

11. Explain the working of a clocked R S flip flop using NAND gates.
12. Explain the formation of sodium doublet.
13. Write a short notes on any three properties of a nucleus.
14. With a neat circuit diagram explain the production of ultrasonic waves by Piezoelectric effect.
15. Using uncertainty principle, prove that electron cannot exist inside the nucleus and hence evaluate the Bohr radius.

PART – C

Answer any FOUR questions                                                                                                (4×12.5=50)

16. Realize using only NAND gates the following combinational circuit. Use K map to obtain the minimal expression
17. State the laws of photoelectric emission? Obtain Einstein’s photoelectric equation.
18. Study the variation of binding energy with atomic mass. Explain how this graph can be used to identify two mechanisms of nuclear energy.
19. Obtain Newton’s formula for velocity of sound in gases. Why did Laplace correct this expression? What is the correct expression?
20. With a neat schematic explain how the wave nature of a moving particle was established through Davisson – Germer experiment.

 

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