Sree Narayana Guru College of Engineering and Technology, Payyanur
Second series test - April 2007
ENGINEERING PHYSICS(B)
(ME)
Time: 2Hours Marks: 50
Part A: Answer all questions
Second series test - April 2007
ENGINEERING PHYSICS(B)
(ME)
Time: 2Hours Marks: 50
Part A: Answer all questions
1. What are the differences between spontaneous and stimulated emission.
2. Explain the basic principle of Holography. Mention its applications.
3. Describe the working of He-Ne laser with energy level diagram.
4. What are ultrasonics? How they are detected?
(4x5=20 Marks)
Part B: Answer two questions
5 (a) What are isochromatics and isoclinics? Give the mathematical analysis of them. (10 Marks)
(b) Write a note on Meissner effect. (5 Marks)
OR
6 (a) Explain the magnetic behaviour of type І and type II superconductors. (10 Marks)
(b) Arrive at stress-optic relations for two-dimensional case. (5 Marks)
7 (a) State and derive Bragg’s law of X-ray diffraction. Describe X-ray spectrometer and explain how it is used to determine the interplanar spacing of a crystal. (10 Marks)
(b) Give an account of various breakdown mechanisms. (5 Marks)
OR
8 (a) Explain with energy band diagram the classification of solids into metals, semiconductors and insulators. (5 Marks)
(b) Write a note on radiographic method of nondestructive testing. (5 Marks)
(c) Explain the importance of reverberation time in good acoustics (5 Marks)