Engineering Physics Question Paper - December 2013 - First Year Engineering (Set B) (Semester 1) - Rajiv Gandhi Proudyogiki Vishwavidyalaya (RGPV)

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Engineering Physics - December 2013

RGPV First Year Engineering (Set B) (Semester 1)

Total marks: --
Total time: -- INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Answer any one question from Q1 & Q2

1 (a) State and explain Heisenberg's uncertainty principle. Discuss an experimental illustration of it. 7 marks

1 (b) An X-ray photon of wavelength 0.4A° is scattered through an angle 45° by a loosely bound electron. Find the wavelength of the scattered photon. 7 marks

2 (a) Derive Schrodinger time-independent equation for matter wave. 7 marks

2 (b) Obtain expression of energy level for particle tapped in one dimensional square with infinitely deep potential well. 7 marks

Answer any one question from Q3 and Q4

3 (a) Describe the construction and working of Michelson's interferometer. Explain the principle of formation of circular fringes. 7 marks

3 (b) Discuss working of Nicol prism as polarizer and analyser. 7 marks

4 (a) Obtain an expression for maxima and minima due to diffraction of light by single slit. 7 marks

4 (b) A plane transmission diffraction grating has 45000 lines. Determine its resolving power in the second order for wavelength of 5000 A°. 7 marks

Answer any one question from Q5 & Q6

5 (a) Explain the postulates of the liquid drop nuclear model. 7 marks

5 (b) Discuss the working of Betatron and obtain the relation for betatron condition. 7 marks

6 (a) Describe the construction and working of Bainbridge mass spectrograph. 7 marks

6 (b) A.G.M. counter wires collects 10⁸ electrons per discharge when the counting rate is 500 count/minute. What will be the average current in the circuit? 7 marks

Answer any one question from Q7 & Q8

7 (a) Describe the behaviour of an electron in periodic potential using the final expression of Kronig-Penney Model. 7 marks

7 (b) What is super conductivity? Discuss Meissner effect. 7 marks

8 (a) Discuss the basic operation and characteristics of a solar cell with necessary diagram. 7 marks

8 (b) Explain the dielectric loss. Obtain an expression for loss tangent of it. 7 marks

Answer any one question from Q9 & Q10

9 (a) Discuss construction and working of He-Ne laser with energy level diagram. 7 marks

9 (b) An SI optical fiber of diameter 55 μm has a numerical aperture of 0.23. If the wavelength of input light is 0.82 μm, determine the number of modes of the cable. 7 marks

10 (a) Obtain the relation between the transition probabilities of Einstein's A and B coefficient. 7 marks

10 (b) Write a short note on different loss mechanism in an optical fiber. 7 marks

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