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M.E.S ASMABI COLLEGE, DEPT. OF PHYSICS,1st INTERNAL JANUARY 2019
VI SEMESTER BSc PHYSICS
PH6 B10: THERMAL AND STATISTICAL PHYSICS
Time: 2 hours Maximum Marks: 50
Section A (Answer all, each carries 1 mark)
1. What is intensive property?
2. Name the process in which dQ=dW.
3. Shape of TS diagram for adiabatic process is ….
4. How can the efficiency of Carnot’s engine be increased?
Section B (Answer all, each carries 2 marks)
5. Distinguish between reversible and irreversible process.
6. State the principle of increase of entropy.
7. State Second law of thermodynamics.
8. State Carnot’s theorem.
9. What are the conditions for reversibility?
10. Explain Zeroth law with its significance.
Section C (Answer all, each carries 4 marks)
11. Calculate the work done in an isothermal expansion
12. Prove that the slope of adiabatic is γ times the slope of isothermal.
13. Calculate the change in entropy in an irreversible process.
Section D (Answer any 3, each carries 4 marks)
14. 2 moles of O2 at 00C are compressed to one fourth of its initial volume at same temperature. Calculate the work done.
15. A Carnot’s engine with cold reservoir at 170C has 30 % efficiency by how much hot reservoir alone be raised in temperature to have 60 % efficiency.
16. 1 Kg of water at 100 0C is dropped in to Indian Ocean at 250C. Calculate change in entropy of Universe.
17. The efficiency of a Carnot engine is 1/6. On reducing the temperature of sink by 650C efficiency becomes 1/3. Find out initial temperatures of source and sink.
Section E (Answer any 1, 10 marks)
18. Calculate the change in entropy of a perfect gas in terms of different thermodynamic variables.
19. What is meant by adiabatic process? Derive an expression for it in terms of P and V.
M.E.S ASMABI COLLEGE, DEPT. OF PHYSICS,1st INTERNAL JANUARY 2019
VI SEMESTER BSc PHYSICS
PH6 B11 SOLID STATE PHYSICS, SPECTROSCOPY & LASER PHYSICS
Time: 2 hours Maximum Marks: 50
Section A (Answer all, each carries 1 mark)
1. According to Boltzmann ‘s distribution law , at thermal equilibrium
a) N1= N2 b) N1<N2 c)N1>N2 d)None
2. A symmetric top molecule is described by
a)IA = 0, IB = IC b) IA = IB = IC c) IA ≠ IB ≠ IC d) None of these.
3. The frequency range of microwave radiation is from ---------- to ----------- Hz.
4. The wave number 0.3cm-1 corresponds to …………………frequency
a) 9GHz b) 3GHz c) GHz d) none
5. Molecules having permanent dipole moment are said to be ………….
6. The wave length of light emitted from a Ruby Laser is………………Aͦ
Section B (Answer all, each carries 2 marks)
7. What are the properties of Laser.
8. Write a note on pumping?
9. What are the advantages of gas laser over solid state laser?
10. What are the factors affecting ideal spectrum?
11. Derive the expression for zero point energy.
Section C (Answer any 3, each carries 4 marks)
12. Explain the factors affecting the width of spectral lines.
13. Draw the schematic diagram of an emission spectrophotometer and explain its working.
14. How does the isotope effect influence the rotational constant of a molecule?
15. Explain the working of Semiconductor Laser.
Section D (Answer any 3, each carries 4 marks)
16. Derive the relation between Einstein’s coefficients.
17. Evaluate the moment inertia of a rigid rotator.
18. The separation between lines in the rotational spectrum of HCl molecule is found to be 20.92 cm-1. Calculate the bond length.
19. The fundamental and first overtone transitions of 14N16O are centred at 1876.06 cm-1 and 3724.20 cm-1 respectively. Evaluate the equilibrium vibration frequency, anharmonicity constant and exact zero point energy.
Section E (Answer any 1-10 marks)
20. Explain the construction and working of Ruby Laser with diagram.
21. Discuss the rotational spectra of a diatomic molecule as a a) harmonic oscillator and b) anharmonic oscillator.
M.E.S.ASMABI COLLEGE, P. VEMBALLUR
VIth SEMESTER B Sc PHYSICS FIRST INTERNAL EXAMINATION FEBRUARY 2019
NUCLEAR PHYSICS
Time: 2 hours Marks: 50
SECTION A
(Answer all Questions, each carries 1 mark)
1. The size of nucleus is of the order of ….
2. The expression for nuclear magneton is ……
3. The spin of neutron is …..
4. For even-even nuclei pairing energy is ……...
5. The alpha particle is identical with ……. nucleus
6. The neutrino hypothesis was put forward by …….
SECTION B
(Answer all Questions, each carries 2 marks)
7. What are isotones and isobars?
8. Distinguish between strong interaction model and independent particle model.
9. Define mass defect and binding energy.
10. What is meant by Q value of a nuclear reaction?
11. Write down two properties of alpha particles
SECTION C
(Answer any 3, each carries 4 marks)
12. Briefly explain what shell model is.
13. Roughly estimate mass of pion using uncertainty principle.
14. Briefly explain different types of beta decay processes.
15. Explain what is meant by nuclear magnetic resonance.
SECTION D
(Answer any 3, each carries 4 marks)
16. Calculate the binding energy of 120Sn50Atomic mass of 120Sn = 119.9022u, mass of hydrogen atom = 1.00783u, mass of neutron= 1.00865u. 1u= 931.5 MeV
17. Show that nuclear magneton is 1837 times smaller than Bohr magneton.
18. The half life of 238U92 against alpha decay is 4.5x109 years. Calculate the time taken by uranium to reduce 80% of the initial amount.
19. Derive the relation kα = Q
SECTION E
(Answer any one, carries 10 marks)
20. From liquid drop model derive Weizsacker semi empirical mass formula.
21. Derive Geiger-Nuttal law of alpha decay.
M.E.S ASMABI COLLEGE
DEPT. OF PHYSICS, 1st INTERNAL JANUARY 2019
VI SEMESTER BSc PHYSICS PH6 B19 COMPUTATIONAL PHYICS
Time: 2 hours Maximum Marks :50
Section A (Answer all questions ) 5x1=5
1. Dictionaries are defined using__________ brackets
2. Operational modes of python are _______and file mode
3. In python>>> is known as_______
4. When appending a list, a new element is added to the ____________
5. The only one special character allowed in the identifier name is_____________
Section B (Answer any 5 questions,4 marks each) 5x4=20
6. Write a program to find biggest of 3 numbers.
7. Explain any 3 functions associated with list ,with examples.
8. What is meant by conditionals . Explain.
9. What is an operator . Give any 4 examples with their operations.
10. What is the difference between list and tuple,with examples.
11. Write a python program to find range of a projectile.
Section C (Answer all,5 marks each) 3x5=15
12. Write a Python program to solve a quadratic equation.
13. Write a program to generate Fibonacci series up to six terms.
14. Write a program to generate factorial of a given number.
Section D (Answer any one, 10 marks) 1x10=10
15. Explain how a set is defined in Python and outline the main set of operations.
16. Explain with example the use of conditionals in Python programming.
M.E.S.ASMABI COLLEGE, P. VEMBALLUR
Vth SEMESTER B Sc PHYSICS FIRST INTERNAL EXAMINATION AUGUST 2018
PH 5B 10 QUANTUM MECHANICS
Time: 2 hours Marks: 50
SECTION A
(Answer all Questions, each carries 1 mark)
1. The region of electromagnetic spectrum capable of generating heat is ……….
2. The wavelength of visible spectrum extends from ………. to ……….
3. The conversion of a photon into electron and a positron is called …..
4. The rest mass of photon is ……..
5. The existence of de Broglie wave was confirmed in the year …….
6. The expression for gravitational red shift is …….
SECTION B
(Answer all Questions, each carries 2 marks)
7. What is the energy of a photon associated with a spectral line of wavelength 400nm?
8. Give any two properties of electromagnetic waves.
9. Write down Planck’s radiation formula and explain the symbols.
10. State any 2 laws of photoelectric effect.
11. What is meant by Schwarzchild radius?
SECTION C
(Answer any 3, each carries 4 marks)
12. What is meant by ultraviolet catastrophe?
13. Show that when a photon of frequency υ falls through a height towards earth, its frequency increases.
14. What is meant by pair production and pair anhilation?.
15. Briefly explain Hertz experiment to confirm the existence of e.m waves.
SECTION D
(Answer any 3, each carries 4 marks)
16. Light of wavelengths 3125A⁰ and 3650 A⁰ causes the emission of electrons having kinetic energies 2.128eV and 1.595eV respectively from sodium. Determine the value of Planck’s constant.
17. The wavelength of a photon is equal to the Compton wavelength of electron. What is its energy in MeV?
18. The work function of sodium is 2.3eV. Does sodium show photo electric emission for orange light of wavelength λ= 6800A°?
19. Calculate the value of Schwarzchild radius..
SECTION E
(Answer the question, carries 10 marks)
20. Explain what is meant by Compton effect. Derive the expression for Compton shift.
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MES ASMABI COLLEGE, P.VEMBALLUR
FIFTH SEMESTER B.Sc. DEGREE EXAMINATION –AUGUST 2018
Time : 2hr MECHANICS Max.Mark:50
PART-A (Answer all questions –1marks )
1. Define proper length.
2. Give an example for non inertial frames of reference .
3. What is meant by fictitious force?
4. State Work energy theorem
5. Define centre of mass of a system of two particles.
6.State the law of conservation of Linear momentum.
PART- B (Answer all questions -2 marks)
7. Write down the Galilean co-ordinate transformation relations.
8. Distinguish between coriolis and centrifugal force.
9. What are conservative forces? Give two examples.
10. Distinguish between jet motion and rocket motion.
PART-C (Paragraph questions – Answer any 2, each carries 4 Marks)
11.Explain about the effect of coriolis force on a freely falling objects.
12.”Simultaneity is not absolute but relative” Comment on the statement.
13. Explain potential well and Potential energy Curve.
PART –D(Problems - Answer any 2 ,each carries 4 Marks)
14.A rod of proper length 3m moves with a velocity 0.8c in a direction making an angle 60o with its length .Find the apparent length.
15.In a rotating frame of reference a mass 1 kg is placed 0.5m from the axis. Find the centrifugal and coriolis force on the mass if the frame rotates at the rate of 20 rad/s .
16.Show that the force F= (2xy+yz2) i+(x2+xz2) j+(2xyz) k is conservative.
PART-E(ESSAY – Answer any 2, each carries 10 Marks)
17. Explain about the null results of Michelson- Morley experiment.
18. Obtain the Lorentz transformation equations.
19. Explain the principle of a rocket. Derive an expression for the velocity of rocket at any instant.
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M.E.S ASMABI COLLEGE, DEPT. OF PHYSICS,
1ST INTERNAL EXAMINATION AUGUST 2017
PHYSICS – OPEN COURSE
PH5 D 01 (i) – NON - CONVENTIONAL ENERGY SOURCES.
Time: 1 hour Maximum marks 25
Section A
(Answer all questions, each carries 1 mark each)
1. The radiations absorbed by ozone layer are ------
a) infra red b) ultra-violet c) visible d) gamma rays
2. Purpose of a solar cell is to convert solar energy to :
a) Heat energy b) electrical energy c) chemical energy d) magnetic energy
3. Solar constant is -------
a) 140 W/m2 b) 1.4 W/m2 c) 1.4 kW/m2 d) 1.4 MW/m2
4. Expand HDR ………
5. Hot molten or partially molten rocks are called ……..
Section B (Answer 3 questions, 2 marks each)
6. What are conventional sources of energy?
7. What is meant by insolation?
8. Explain volcanoes?
Section C(Answer any 1, 4 marks)
9. Discuss 2 types of liquid dominated or wet steam system
10. Briefly explain the working principle of solar air heater?
Section C(Answer any 1, carries 10 marks )
11. Explain general categories of Geothermal resources.
12. With the help of a neat diagram explain the working of a Pyrheliometer.
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M.E.S.Asmabi College
Department of Physics- Ist Internal Examination August 2018
Vth semester B Sc.Physics – PH5 B12: ELECTRONICS
Time: 2 hrs Marks : 50
Section A
(Answer all questions)
1. If f is the input frequency of a half wave rectifier, the frequency of pulsating dc output is
2. A Zener diode is commonly used as ----------------
3. Maximum efficiency of a full wave rectifier is -----
4. The Peak Inverse Voltage of a half wave rectifier is -----
5. The base of a transistor is ---- doped
6. The point of intersection of dc load line and output characteristic curve is the ------------
(6 x 1 =6)
Section B
(Answer all questions)
7. What is Ripple factor?
8. What is the function of a filter circuit?
9. Write the relation between α and γ of a CC transistor configuration.
10. Draw the circuit diagram of a Bridge rectifier.
11. Define α, Show it is always less than unity.
12. What do you mean by Operating point?
13. What are the advantages of CE configuration? (7X2 = 14)
Section C
(Answer all questions)
14. Draw the circuit of CE amplifier. Explain the function of each component. Also show that the output is 1800 out of phase with the input.
15. Draw the dc and ac equivalent circuits of transistor amplifier.
16. Explain the different types of filter circuits. (3 x 4 = 12)
Section D
(Answer all questions)
17. A Zener diode is used to convert 12 V dc in to 9 V stabilized output. The series resistance is Rs = 120Ω. If the load current is 15 mA, what is the current through the zener diode?
18. In a common base connection, IC= 1 mA and IB = 40 µA. Find the value of α. (2 x 4 = 8)
Section D
(Answer any one question)
19. Explain with neat diagram, the CE characteristics of a transistor.
20. Explain transistor biasing. (1 x 10 = 10)
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V Semester Degree Examination AUGUST 2018 (First Internal)
Core Course – PH5 B11
PHYSICAL OPTICS & MODERN OPTICS
Time: 2 hours Total Marks 50
Paragraph questions. Answer any five questions(5x4=20 )
1. Obtain the expression for translation matrix
2. State and explain Fermat’s principle of extremum path.
3. What are the advantages of using matrix method in paraxial optics?
4. Explain rectilinear propagation of light using Fermat’s principle.
5. Define optical path. Set up an expression for it.
6. Write the system matrix in terms of Magnification(consider image plane).
problems. Answer any 2 questions (2x5=10)
7. An object is placed 20cm from a convex lens of focal length 15cm. Find the position of the image and magnification using system matrix.
8. Find the focal length of Huygen’s eyepiece by finding the system matrix. Huygen’s eyepiece consists of two plano-convex lenses each of focal length 3f and f separated by a distance of 2f.
9. Obtain a Refraction matrix.
Essay questions.Answer all (2x10=20)
10. Using Fermat’s principle, prove the laws of reflection and refraction
11. Derive system matrix for a thick lens and hence arrive at Lens Maker’s Formula
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MES ASMABI COLLEGE, P.VEMBALLUR
FIFTH SEMESTER B.Sc. DEGREE EXAMINATION –AUGUST 2018
Time : 2hr ELECTRODYNAMICS II Max.Mark:50
PART-A (Answer all questions –1marks )
1. A practical constant current source have the internal resistance ----------------
2. Efficiency of a network while transferring maximum power to the load is ---------
3. Lenz’s law is a consequence of law of conservation of -----------------
4. An inductor stores energy in its ----------------
PART- B (Answer all questions -2 marks)
5. State Norton’s theorem.
6. Write down Maxwell’s equations.
7. State Faraday’s law of electromagnetic induction
PART-C (Paragraph questions – Answer any 2, each carries 5 Marks)
8.Derive Neumann formula for mutual induction between two loops.
9.Explain the procedure to thevenize a circuit
10.Explain what necessitated Maxwell to introduce the displacement current.
PART –D(Problems - Answer any 2 ,each carries 5 Marks)
11.Prove that when maximum power is transferred, impedance of the network viewed w.r.to the output terminals equals the load impedance .
12.A parallel plate air capacitor has circular plates of radius 5cm .It is being charged so that the electric field varies at a rate of 1012V/ms. Find the displacement current in it.
13.Convert the linear network into thevenin’s equivalent network and find the power delivered to the load RL=15ꭥ,Vs=12V,R1=3ꭥ,R2=6ꭥ,R3=7ꭥ
PART-E(ESSAY – Answer any 2, each carries 10 Marks)
14.State and prove super position theorem in electric network.
15.Derive the Maxwell’s equations inside a polarized matter.
16.Find the boundary conditions for E,B,D and H at a surface which carries charge density σ and current density K ,which separates two media.
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M.E.S.ASMABI COLLEGE, P. VEMBALLUR
Vth Semester B Sc (Physics) Second Internal Examination October 2018
PH5 B07 - QUANTUM MECHANICS
Time: 2 hours Marks: 50
SECTION A
(Answer all Questions, each carries 1 mark)
1. The potential through which electron is accelerated to attain ionization energy is called ….
2. The expression for de Broglie wavelength is ….
3. The maximum probability of wave is …….
4. Frank-Hertz experiment was demonstrated to prove ……..
SECTION B
(Answer all Questions, each carries 2 marks)
5. What is meant by probability density?
6. What is Heisenberg’s uncertainty principle?
7. What is the basic principle of scanning electron microscope?
8. Write down names of spectral lines emitted by hydrogen atom.
9. State the conditions for a well behaved wave function.
SECTION C
(Answer any 2, each carries 4 marks)
10. Obtain the expression for radius of electronic orbit.
11. Briefly explain the impact of nuclear motion on the magnitude of energy level.
12. What is correspondence principle? Elaborate.
SECTION D
(Answer any 2, each carries 4 marks)
13. Obtain the expression for velocity of de Broglie wave packet associated with a moving body.
14. Using uncertainty principle show that electrons cannot exist inside nucleus.
15. Calculate the wavelength of radiation emitted when He+ makes a transition from the state ni = 3 to the state ni = 2.
SECTION E
(Answer any one, carries 20 marks)
16. Derive the expression for energy levels of hydrogen atom. From this obtain the spectral series of hydrogen atom and illustrate with the help of energy level diagram.
17. Derive the time dependent Schrodinger wave equation.
M.E.S.ASMABI COLLEGE, P. VEMBALLUR
Vth Semester B Sc (Physics) Second Internal Examination October 2018
PH5B07 - QUANTUM MECHANICS
Time: 2 hours Marks: 50
SECTION A
(Answer all Questions, each carries 1 mark)
1. The potential through which electron is accelerated to attain ionization energy is called ….
2. The expression for de Broglie wavelength is ….
3. The maximum probability of wave is …….
4. Frank-Hertz experiment was demonstrated to prove ……..
SECTION B
(Answer all Questions, each carries 2 marks)
5. What is meant by probability density?
6. Write down the equation for steady state form of Schrodinger equation and what does it represent?
7. Give any 2 postulates of quantum mechanics.
8. Graphically represent the wave function of a particle trapped in a box of width L.
9. What is meant by orthogonality of a wave function?
SECTION C
(Answer any 2, each carries 4 marks)
10. Obtain the expression for radius of electronic orbit.
11. Briefly explain the impact of nuclear motion on the magnitude of energy level.
12. What is correspondence principle? Elaborate.
SECTION D
(Answer any 2, each carries 4 marks)
13. Normalise the wave function ψ (x) = sin kx between - to with k =
14. An electron with energy 1 eV incidences on a barrier of height 10eV and width 0.5nm. Find the transmission probability. [m = 9.1x10-31 kg, ћ = 1.054x10-34 J.s]
15. An eigen function of the operator is sin nx where n = 1, 2, 3,… Find the corresponding eigen values.
SECTION E
(Answer any one, carries 20 marks)
16. Derive the expression for energy levels of hydrogen atom. From this obtain the spectral series of hydrogen atom and illustrate with the help of energy level diagram.
17. Derive the time dependent Schrodinger wave equation.
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M E S ASMABI COLLEGE
V Semester B Sc. (Physics) II internal Examination October 2018
Core Course – PH5B12 ELECTRONICS
Time: 2 hours Total Marks: 50
Section A. Answer all the questions (4 x 1 = 4)
1. In an AM wave, majority of power is in------------
2. In digital transmission, ------ modulation is used.
3. Noises are variations in ------.
4. What is modulation factor?
Section B. Answer all questions (4x2=8)
5. Write the expression for the voltage gain of a two stage RC coupled amplifier.
6. What are the advantages of direct coupling?
7. What is the importance of sideband frequencies?
8. What do you mean by Barkhausen criterion?
Section C Answer any 3questions (3 x 4 = 12)
9. A carrier of 120 V and 2 KHz is modulated by 60 V 1 KHz sinusoidal signal. What is the percentage of modulation?
10. An amplifier has a gain of 500 without feedback. With negative feedback the gain is reduced to 20. Find the feedback ratio.
11. Determine the closed loop gain for a non inverting Op amp. Given the feedback resistance is 100 KOhm and input resistance is 50 K Ohm.
12. Determine the operating frequency and feedback fraction for Colpitts oscillator. Given C1= 0.001µF, C1= 0.01µF, L = 10µH
Section D Answer any 4 questions. (4 x 4 = 16)
13. Explain the frequency response of an RC coupled amplifier
14. Explain the working of an OP-amp integrator and differentiator
15. What are the difference between FM and AM.
16. Draw the diode detector circuit and explain its action.
17. Explain the features of negative feedback.
Section E, Answer any One. (1 x 10 = 10)
18. Analyze an amplitude modulated wave. Derive an expression for the fraction of total power carried by the side bands in amplitude modulation.
19. With the help of a diagram explain the working of a two stage RC coupled amplifier.
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M.E.S ASMABI COLLEGE 1ST INTERNAL EXAMINATION OCTOBER 2018
I SEMESTER B.Sc. PHYSICS PH1 B 01- METHODOLOGY OF SCIENCE AND PHYSICS
Time: 2 hours Total marks: 50
Section A (Answer all questions)
1. The knowledge obtained by deductive reasoning is called…..
2. Say whether true or false – Science does not make moral judgments
3. Aristotle used … to explain things
4. When hypothesis is confirmed, then it is called ….
5. Expertise acquired by a person through experience or education is known as….
6. Vectors A and B are such that |A+B| = |A – B|. Then the angle between them is…. 6x1 =6
Section B (Answer all questions)
7. Science is an ongoing process. Explain.
8. Point out two problems related to Modern science.
9. What is meant by hypothesis?
10. Explain what is meant by Occam’s Razor.
11. Define equal vectors and null vectors
5x2=10
Section C (Answer any three questions)
12. With examples explain two different types of knowledge
13. What are main aspects of scientific temper?
14. Explain Orthogonal curvilinear coordinates
15. Explain inverse of a matrix
16. Explain Cramer’s rule.
3x4 = 12
Section D (Answer all)
17. Show that (A X B).(A X B) = A2B2 – (A . B)2
18. Find the angle between body diagonals of a cube. Given A= -i-j+k, B=i+j+k
19. For a parallele piped, A=i+2j-k, B= j+k, C=i-j, Find its volume.
3x4 = 12
Section E
20. Explain the vector operations such as addition, subtraction, Multiplication etc. in detail with examples.
1x10=10 mod8���
M.E.S ASMABI COLLEGE, DEPT. OF PHYSICS,
IInd INTERNAL EXAMINATION OCTOBER 2018
PHYSICS – OPEN COURSE
PH5 D 01 (i) – NON - CONVENTIONAL ENERGY SOURCES.
Time: 1 hour Maximum marks 25
Section A
(Answer all questions, each carries 1 mark each)
1. In solar cooker solar energy is converted to ------
2. ……. is movement of air
3. Savonius type of wind turbine is an example of ….
4. Expand HDR ………
5. Hot molten or partially molten rocks are called ……..
Section B (Answer 3 questions, 2 marks each)
6. What are conventional sources of energy?
7. What is meant by insolation?
8. Explain volcanoes?
Section C(Answer any 1, 4 marks)
9. Discuss 2 types of liquid dominated or wet steam system
10. Briefly explain what is a solar pond?
Section C(Answer any 1, carries 10 marks each)
11. Explain general categories of Geothermal resources.
12. With the help of a neat diagram explain the working of a Pyrheliometer.
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