Shanmugha Arts Science Technology and Research Academy (SASTRA) University 2007 B.Tech Electronics and Communications Engineering ENGINEERING PHYSICS - Question Paper

SASTRA UNIVERSITY
Subject name ENGINEERING PHYSICS-I
examination type Summer Term-June 2007

PART-A
ans all the ques.. 20x2=40M
01. What are inertial frames of reference?
02. A static body explodes into 2 fragments of rest mass 1Kg that move apart at speed of 0.6c. obtain the rest mass of the original body.
03 Mention 2 applications of Ultrasonics?
04. What is meant by radiation resistance?
05. What is piezo electric effect?
06. Define Fermi Energy.
07. What are extrinsic semiconductor?
08. What is meant by depletion region?
09. Distinguish ranging from direct and indirect band gap semiconductors.
10. Draw energy band diagram of a semiconductor.
11. Define dielectric constant.
12. What are hard and soft magnetic materials?
13. What is meant by meissner effect?
14. Mention 2 applications of ferrite.
15. What are magnetic bubbles?
16. Define lattice points.
17. What are miller indices?
18. Define density of packing.
19. Calculate the co-ordination number for a simple cubic lattice.
20. Find the miller indices of a plane which cuts the intercepts of 2,3and4 units along the 3 axes.
PART-B
Answer all the ques.. 4x15=60M
21. • Describe Michelson-Moreley experiment and provide explanation to it negative outcome.
22. • Derive an expression showing variation of mass with velocity.
• Derive mass- energy relation.
23. • Give the theory of Hall Effect in the case of semiconductor.
• Explain the experimental determination of carrier concentration and mobility.
24. • Sketch the variation of Fermi level with temperature in the case of P and N kind semiconductors for high and low doping levels. define an experiment for finding the band gap of a semiconductor.
25. • Distinguish ranging from various kinds of magnetic materials.
26. • Explain briefly the various kinds of super conductors. provide an account of high temperature super conductors and the applications of super conductors.
27. • Calculate the co-ordination number and density of packing of FCC structure. Also discuss the properties of diamond on the basis of the structure.
28. • Deduce Wiedmann-Franz legal regulations using classical free electron theory.
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Earning:   Approval pending.