Mahatma Gandhi University (MGU) 2008 B.Tech Computer Science and Engineering - Data Base Management System - Question Paper

every ques. CARRIES four MARKS. (10 X four = 40 MARKS)
1. discuss the terms (a) Population inversion and (b) Metastable state.
2. Write a short note on semiconductor laser.
3. What is isotopic effect on superconductors?
4. Briefly discuss any 4 applications of superconductors.
5. elaborate various crystal systems?
6. describe Packing factor. compute the packing factor for body-centred cube.
7. describe Magnetic permeability and Susceptibility. find the relation ranging from them.
8. How are dielectric materials classified?
9. With a neat diagram, discuss the structure of an optical fibre.
10. discuss any 4 advantages of Optical fibre over the conventional cables.
every ques. CARRIES 12 MARKS. (5 X 12 = 60 MARKS)
11. (a) define the construction and working of an electron microscope.
Or
(b) define the construction and working of He-Ne laser.
12. (a) elaborate kind I and kind II superconductors? discuss B.C.S. with the key note of Cooper pairs.
Or
(b) What is SQUID ? discuss its working. discuss Josephson effect.
13. (a) What do you mean by Miller indices? provide their role in crystal structure. compute the separation ranging from
lattice planes in face-centred cubic lattice.
Or
(b) provide the theory of Bragg’s X-ray diffraction. define Bragg’s X-ray spectrometer. How it is used to verify Bragg’s
law?
14. (a) How do you distinguish ranging from Diamagnetic, Paramagnetic and Ferromagnetic materials?
Or
(b) What is piezoelectric effect? With necessary circuit diagram, discuss the production of ultrasonics using
Piezoelectric crystal.
15. (a) discuss with necessary theory, the propagation of light in optical fibres. Derive the expression for numerical
aperture.
Or
(b) define different kinds of optical fibres. discuss optical fibre sensors.

Earning:   Approval pending.