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2003 Course Applied Science - II

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Total No. of Questions : 12] [Total No. of Printed Pages : 4 [3761]-17 F. E. Examination - 2010 APPLIED SCIENCE - II (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions : (1) Answer to the two sections should be written in separate books. (2) Black figures to the right indicate full marks. (3) Use of logarithmic tables, slide rule, mollier charts, electronic pocket calculator and steam tables is allowed. (4) Neat diagrams must be drawn wherever necessary. (5) Assume suitable data, if necessary. Constants : h = 6.63 10 34 J-sec. me = 9.1 10 31 kg. e = 1.6 10 19 C c = 3 108 m/sec. SECTION - I Q.1) (A) Explain De-Broglie s Concept of Matter Waves. Derive an Expression for the De-Broglie Wavelength in terms of Energy. [06] (B) Derive Expressions for Energy and Wave Function of a Particle in a Rigid Box. [07] (C) An electron is bound by a potential box of infinite height having a width 2.5Ao. Calculate the minimum uncertainty in its velocity. [04] OR [3761]-17 1 P.T.O. Q.2) (A) Derive Schrodinger s Time independent wave equation. [06] (B) State Heisenberg s Uncertainty Principle. Illustrate the same with the help of Electron Diffraction Experiment at a Single Slit. [06] (C) Write short note on Physical Significance of . [05] Q.3) (A) Explain construction and working of He-Ne Gas Laser with neat labelled diagram. [06] (B) What is Holography ? Write a note on Holography Recording. [04] (C) State and explain : [07] (1) Meissner Effect (2) Critical Fields (3) Zero Resistance OR Q.4) (A) (1) Explain the Process of Stimulated Emission and Population Inversion. [04] (2) Explain special properties of Laser. [04] (B) What are Ferrates ? Discuss their properties and uses. [06] (C) Discuss applications of Superconductors. [03] Q.5) (A) Show that the Fermi-Level lies exactly at the centre of the energy gap in an Intrinsic Semiconductor. [06] (B) Obtain an expression for the displacement produced when an electric field acts perpendicular to the motion of an electron. [06] (C) Draw energy band diagrams of P-N Junction Diode under Forward Bias and Reverse Bias Conditions. [04] OR [3761]-17 2 Contd. Q.6) (A) Derive an Expression for Conductivity in an Intrinsic and Extrinsic Semiconductors. [06] (B) Give the principle, construction and working of an Electron Microscope. [06] (C) Electrons accelerated by a potential of 250V enter the electric field at an angle of incidence 50o and get refracted through an angle of 30o. Find the potential difference between the two regions. [04] SECTION - II Q.7) (A) What is Proximate Analysis ? Explain the method of analysis of each of these constituents along with the significance ? [07] (B) Give composition, boiling range and uses of fractions obtained in distillation of crude oil. [06] (C) 0.72 gm of a fuel containing 80% carbon when burnt in a bomb calorimeter, increased the temperature of water from 27.3oC to 29.1oC. If the calorimeter contains 250 gm of water and its water equivalent is 150 gm. Calculate HCV in kJ/kg. [04] OR Q.8) (A) What is meant by Natural Gas ? Give composition, properties and applications of LPG and CNG. [07] (B) What is Biodiesel ? Explain the process to get it from animal oil. State advantages of it over conventional diesel. [06] (C) A producer gas has the following percentage composition by volume CH4 = 3.5%, CO = 25%, H2 = 10%, CO2 = 10.8%, N2 = 50.7%. Calculate theoretical air required per m3 of the gas. [04] Q.9) (A) What is Dry Corrosion ? Discuss the role of nature of oxide film formed in oxidation corrosion of metal. State and explain Pilling Bedworth Rule. [07] (B) How are Metals Coated by Hot Dipping Technique ? Give the applications of Galvanising and Tinning. [06] (C) Distinguish between Cathodic Protection and Anodic Protection. [04] OR [3761]-17 3 P.T.O. Q.10) (A) What is Wet Corrosion ? Discuss the mechanism of Wet Corrosion. [07] (B) Explain Corrosion in Zn Coated Iron and Tin Coated Iron, which is more protective ? And Why ? [06] (C) What happens when ? [04] (1) Impurity is present in metal. (2) Iron Rod is buried in moist soil. (3) Zn Rod is dipped in CuSO4 Solution. (4) A Metal under water drop. Q.11) (A) (B) (C) Give instrumentation involved in UV Visible Spectroscopy. [06] State the principle and technique involved in Paper Chromatography. [06] Define the terms : [04] (1) Wavelength (2) Frequency (3) Wavenumber (4) Energy OR Q.12) (A) Describe principle and experimental setup of Column [06] Chromatography. (B) Give applications of IR Spectroscopy. [06] (C) Define the terms : [04] (1) R f (2) R x (3) Chromatogram (4) Elution [3761]-17/4

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