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B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2006. Third Semester Civil Engineering CY 1201 — ENVIRONMENTAL SCIENCE AND ENGINEERING (Common to all branches (EXCEPT Bio—Medical Engineering, Computer Scienceand Engineering, Electronics and Communication Engineering/InformationTechnology and Petroleum Engineering) and Common to B.E. (Part—Time)Second Semester (Regulation 2005)) (Regulation 2004) Time : Three hours Maximum : 100 marks Answer ALL questions PART A — (10 x2 : 20 marks) 1. Explain endangered species. 2. What do you mean by avvironmental impact? 3. Explain soil leachii g.` 4. What is acil urecipitation? 5. Explain overgrazing. 6. What is desertification? 7. Define photochemical smog. 8. Define population equilibrium. 9. What is water logging? 10. What are the types of` solid wastes? PART B — (5 >< 16 =" 80"> 14. (a) (i) What is sustainable development and explain its concepts? (4) (ii) Discuss the agenda for sustainable development. (8) (iii) What are t

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2008. Third Semester Electronics and Instrumentation Engineering EC 1261 — ELECTRONIC CIRCUITS ¤Common to Instrumentation and Control Engineering) (Regulation 2004) Time : Three hours Maximum : 100 marks. Answer ALL questions. PARTA — 10 x 2 = 20 marks 1. Draw the fixed and self bi ¤s mi ;uit of BJT. 2. Draw the h-parameter eqiivalent circuit of a Common—emitter transistor. 3. What is CMRR 4. Draw a tuiresl circuit. 5. Define feedback factor. 6. What are the conditions of oscillation in sinusoidal oscillators. 7. What is time constant in a RC circuit? 8. What is a clipper? 9. Define peak inverse voltage of a rectifier. 10. Draw the functional block diagram of SMPS. PART B -— (5 x 16 : 80 marks) A11. (a) (i) Derive the expressions for the input resistance, voltage gain,current gain, and output admittance of a transistor amplifier interms of h-parameters. (8) (ii) Explain about Cascode and Darlington connections. (8) Or (b)

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