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Sem - I Jun 2008 Pattern Applied Science - I

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Total No. of Questions : 12] [Total No. of Printed Pages : 4 [3761]-102 F. E. (Semester - I) Examination - 2010 APPLIED SCIENCE - I (June 2008 Pattern) Time : 3 Hours] [Max. Marks : 100 Instructions : (1) Answer any three questions from each section. (2) Answers to the two sections should be written in separate books. (3) Black figures to the right indicate full marks. (4) Neat diagrams must be drawn wherever necessary. (5) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. (6) Assume suitable data, if necessary. Constants : h = 6.63 10 34 J.sec. m = 9.1 10 31 kg e = 1.6 10 19 C c = 3 108 m/sec. SECTION - I Q.1) (A) What are the types of Symmetries in crystal ? Discuss them with respect to cubic crystal. [07] (B) Explain the line defects in metallic crystals. State the effects of line defects on the properties of metals. [06] (C) X-ray of Wavelength 1.6 Ao are diffracted by a Bragg s crystal spectrometer at angle 14.2o in the first order. What is the spacing of atomic layer in the crystal ? [04] OR Q.2) (A) What is meant by atomic packing factor ? Calculate atomic packing factor for SC, BCC and FCC Structure. [07] (B) Explain the Mesomorphic Phase. Give the types and applications of mesomorphic phase of solids. [06] 1 P.T.O. [3761]-102

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