College : Sahrdaya College of Engineering & Technology
University : University of Calicut
Degree : B.Tech
Semester : I & II
Subject : Engineering Physics
Document type : Model Question Paper
Website : sahrdaya.ac.in
Download Model/ Sample Question Papers : www.pdfquestion.in/uploads/6582-103.docx
Sahrdaya Engineering Physics Model Question Paper
SAHRDAYA COLLEGE OF ENGINEERING & TECHNOLOGY
Combined First and Second Semester B. Tech. Degree Examination
EN09 103
Time: 3hours
Maximum Marks: 70
Related :Sahrdaya College of Engineering & Technology Engineering Chemistry B.Tech Question Paper Model : www.pdfquestion.in/6580.html
April 2013
Part A :
Answer all the questions.
1. Explain double refraction with diagram?
2. Give the physical concept of wave function?
3. What do you meant by reciprocal lattice?
4. Explain Meissner effect?
5. How do you test, the planeness of a glass plate by interference method? (5 x 2 = 10 marks)
Part B :
Answer any four questions.
6. Distinguish between step index fiber and graded index fiber?
7. Explain the properties of Type I and Type II super conductors with suitable diagrams and examples?
8. Examine if two spectral lines of wavelengths 5890Å and 5896Å can be clearly resolved in the (1) first order and (2) second order by a diffraction grating 2 cm wide and having 425 lines/cm.
9. Explain the properties and application of carbon nanotube?
10. A tube 15 cm long is filled with a solution of 60 gms of sugar in 100 ml. of water. It is placed in the path of a plane polarized light. Find the angle of rotation of the plane of polarization of light if the specific rotation of sugar is 65o.
11. Explain how reverberation time affects the acoustic of building? Also give a brief account of corrective measures. (4 x 5 = 20 marks)
Part C :
Answer section (a) or section (b) of each question.
12. (a) Explain Bragg’s law. Explain Bragg’s X-ray spectrometer. How will you verify Bragg’s law using it?
OR
(b). Describe with theory diffraction caused by a plane transmission grating. Explain how the wavelength of a monochromatic source of light is experimentally determined using grating?
13. (a). With the help of a neat diagram explain the construction and working of Semiconductor laser. Mention the application of laser in Medical fields?
OR
(b).Explain the production and detection of a plane polarized light, circularly polarized light and elliptically polarized light?
14.(a).How does the Fermi level change with temperature in extrinsic semiconductor? Discuss the effect of increasing amount of dopants in extrinsic semiconductor.
OR
(b).What is Avalanche break down and Zener break down. Explain the working of a Zener diode. Explain the amplifier characteristics of NPN transistor?
15.(a).What are ultrasonic? Explain piezoelectric effect. How ultrasonic waves are produced using piezoelectric oscillator?
OR
(b).Derive Schrodinger time independent and time dependent wave equations for the free particle? (4 x 10 = 40 marks)
April 2014
EN09 103 – Engineering Physics :
Time: 3hours
Maximum Marks: 70
ANSWER KEY :
Part A :
Answer all the questions.
1. Double refraction definition – 1mark
Diagram – 1mark
2. Physical concept of wave function – 2marks
3. Reciprocal lattice steps – 1mark
Explanation – 1mark
4. Meissner effect definition – 1mark
Figure – 1mark
5. Explanations – 2marks
Part B :
Answer any four questions.
6. Step index fiber – 2marks
Figure – ½ mark
Graded index fiber – 2 marks
Figure – ½ mark
7. Type I super conductors – 1½ marks
Type II super conductors – 1 ½ marks
Diagrams and examples – 2 marks
8. Equation – 1 mark
Substitution – 2marks
Result with unit – 2marks
9. Carbon nano tube explanation – 1 mark
Properties -2 marks
Applications -2 marks
10. Equation – 1 mark
Substitution -2marks
Result with unit -2 marks
11. Reverberation time definition – 1 mark
Explanation – 2 marks
Part C :
Answer section (a) or section (b) of each question.
12. (a) Bragg’s law -3 marks
Bragg’s X-ray spectrometer figure -1 mark
Bragg’s X-ray spectrometer working -3 marks
Verification of Bragg’s law -3 marks
OR
(b). Theory of plane transmission grating – 3 marks
Figure -2 marks
Determination of wavelength of light – 5 marks
13. (a). Construction – 3 marks
Working – 3 marks
Energy level diagram – 2 marks
Application of laser – 2 marks
OR
(b)Production – 5marks
Detection – 5marks
14.(a)Explanation – 2 marks
Derivation – 4 marks
Energy level diagram – 1mark
Final explanation – 3 marks
OR
(b) Avalanche break down -1½ marks
Zener break down. -1½ marks
Working of a Zener diode – 2 marks
Amplifier characteristics – 5 marks
15.(a)Ultrasonic wave – 1 mark
Piezoelectric effect – 2 marks
Figure – 2 marks
Production of ultrasonic waves – 5 marks
OR
(b)Explanation – 2 marks
Derivation of Schrodinger equation – 7marks