Computer Networks - 5th ND10 CS 2302

B.E/B.Tech DEGREE EXAMINATION,NOV/DEC 2010
Fifth Semester
Computer Science Engineering
CS 2302 - COMPUTER NETWORKS
(common to Information Technology)
(Regulation 2008)

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Part-A - (10 * 2=20 Marks)

1. What are the two types of line configuration?
2. What do you mean by error control?
3. What are the functions of Bridges?
4. What is the advantage of FDDI over a basic Token Ring?
5. What is meant by circuit switching?
6. What is multicasting?
7. What is the function of a router?
8. What are the advantage of using UDP over TCP?
9. What is SMTP?
10. What is PGP?





Part-B -(5 * 16 = 80 Marks)

11. (a) Explain in detail the error detection and error corrections.
or
(b) Discuss in detail about the layers of OSI model.

12. (a) Name the four basic network topologies and explain them giving all the relevant features.
or
(b) Explain the functioning of wireless LAN in detail.

13. (a) write notes on the following:
(i) Internet Protocol
(ii) Routers.
or
(b) Discuss in detail the various aspects of Ipv6.

14. (a) With neat architecture,explain TCP in detail.
or
(b) Explain adaptive flow control in detail and its uses.

15. (a) Explain the SMTP and HTTP.give their uses,state strengths and weaknesses.
or
(b) Explain the role of a DNS on a computer network.

Transmission And Distribution - 5th ND10 EE2303

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010
Fifth Semester
Electrical and Electronics Engineering
EE 2303 — TRANSMISSION AND DISTRIBUTION
(Regulation 2008)

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PART A — (10 × 2 = 20 Marks)

1. State the disadvantages of HVDC transmission.
2. Which factors affect sag in the transmission line?
3. Define skin effect.
4. What are the advantages of using bundled conductors?
5. What is Ferranti effect?
6. What is shunt compensation?
7. Define string efficiency.
8. What is the necessity of grading of an under ground cable?
9. List the various substation equipments.
10. Why are transmission lines 3 phase 3 wire circuits while distribution lines are 3 phase 4 wire circuits?





PART B — (5 × 16 = 80 Marks)

11. (a) Discuss in detail the various equipments used in HVDC converter station.
Or
(b) An overhead line has a span of 336 m. The line is supported ,at a water Crossing from two towers whose heights are 33.6 m and 29 m above water level. The weight of conductor is 8.33 N/m and tension in the conductor is not to exceed 3.34 × 104 N. Find (i) Clearance between the lowest point on the conductor and water (ii) horizontal distance of this point from the lower support.

12. (a) Derive the expression for inductance of a three phase line with unsymmetrical Spacing.
Or
(b) A 220 KV, 50 Hz, 200 Km long three phase line has its conductors on the corners of a triangle with sides 6 m, 6m and 12 m. The conductor radius is 1.81 cm. Find the capacitance per phase per km, capacitive reactance per phase, charging current and total charging Mega volt-amperes.

13. (a) What is a nominal ? (pi) circuit? Find the ABCD constants for nominal ? Circuit.
Or
(b) Write short notes on :
(i) Shunt compensation. [Marks 8]
(ii) Series compensation. [Marks 8]

14. (a) Discuss briefly on the following :
(i) Pin Type insulator. [Marks 8]
(ii) Suspension Type insulator. [Marks 8]
Or
(b) Derive the expression for the Insulation resistance, capacitance, Electric stress and dielectric loss of a single core cable.

15. (a) Explain briefly the various types of bus bar arrangements in a substation.
Or
(b) Discuss briefly each of the following :
(i) Feeders. [Marks 4]
(ii) Radial distribution. [Marks 6]
(iii) Ring main distribution. [Marks 6]

Engineering Metrology And Measurements - 5th ND10 ME2304

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010
Fifth Semester
Mechanical Engineering
ME 2304 - ENGINEERING METROLOGY AND MEASUREMENTS
(Common to Production Engineering)
(Regulation 2008)

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PART A — (10 × 2 = 20 Marks)

1. Distinguish between 'Line Standard' and 'End Standard'.
2. Define the term 'Sensitivity' of an instrument.
3. What is meant by wringing of slip gauges?
4. What are limit gauges?
5. What is meant by 'Best size wire' in screw thread measurement?
6. Define the term 'constant chord' of a gear.
7. What are the advantages of laser interferometer?
8. What is a CNC CMM?
9. What are load cells?
10. What is the working principle of bimetallic thermometer?





PART B — (5 × 16 = 80 Marks)

11. (a) (i) Draw the block diagram of a generalized measurement system and explain the various stages with an example. [Marks 10]
(ii) Distinguish between 'Precision' and 'Accuracy' with suitable examples. [Marks 6]
Or
(b) (i) Describe Systematic errors and Random errors. Discuss the means adopted to minimize these errors. [Marks 12]
(ii) Explain the term 'interchangeability'. [Marks 4]

12. (a) (i) Explain, with a neat sketch, the construction and working of a Tool Maker's Microscope. [Marks 8]
(ii) Explain, with a sketch, the construction and working of Solex Pneumatic Comparator. [Marks 8]
Or
(b) (i) What is the principle of Angle dekkor? How is it used for the measurement of angles? [Marks 8]
(ii) Explain the use of an optical flat to test the flatness of measuring surfaces. [Marks 8]

13. (a) (i) Explain the principle of measuring gear tooth thickness by Base tangent method. [Marks 8]
(ii) With a neat sketch, describe the construction and working of a profilometer. [Marks 8]
Or
(b) (i) Derive the formula for measuring the effective diameter of a screw thread by three-wire method. [Marks 8]
(ii) Define straightness. Describe any one method of measuring straightness of a surface. [Marks 8]

14. (a) (i) With a neat sketch explain the working of laser interferometer. [Marks 8]
(ii) Discuss the need of computers in inspection. [Marks 8]
Or
(b) (i) Describe the construction and operation of a coordinate measuring machine. [Marks 12]
(ii) State the advantages of CMM. [Marks 4]

15. (a) (i) Explain the principle of operation of a hydraulic dynamometer. [Marks 8]
(ii) Explain the principle of operation of Bourdon tube pressure gauge. [Marks 8]
Or
(b) (i) Explain the working of a rotameter with a neat sketch. [Marks 8 ]
(ii) Using a sketch, explain the working of an optical pyrometer. [Marks 8]

Object Oriented Programming -3rd ND10 CS2203

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010
Third Semester
Computer Science and Engineering
CS 2203 - OBJECT ORIENTED PROGRAMMING
(Common to Information Technology)
(Regulation 2008)

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PART A — (10 × 2 = 20 Marks)

1. What is data hiding?
2. What are the advantages of default arguments?
3. Write any four special properties of constructor.
4. List any four operators that cannot be overloaded.
5. What is a template?
6. How is an exception handled in C++?
7. When do we make a class virtual?
8. Distinguish between early binding and late binding.
9. Name the features included in C++ for formatting the output.
10. What is file mode? List any four file modes.





PART B — (5 × 16 = 80 Marks)

11. (a) Explain the special features of object oriented programming. (16)
Or
(b) (i) List the special characteristics of friend function. (6)
(ii) Write a C++ program to find the area of the square, rectangle, circle
using function overloading. (10)

12. (a) Explain the different types of constructors with suitable examples. (16)
Or
(b) (i) Write the rules for overloading the operators. (6)
(ii) Write a C++ program to add two complex numbers using operator
overloading. (10)

13. (a) (i) Explain the overloading of template function with suitable example.(8)
(ii) Write a function template for finding the minimum value contained
in an array. (8)

Or

(b) (i) List the advantages of exception handling mechanisms. (4)
(ii) Write a C++ program for the following :
(1) A function to read two double type numbers from keyboard.
(2) A function to calculate the division of these two numbers.
(3) A try block to throw an exception when a wrong type of data is
keyed in.
(4) A try block to detect and throw an exception if the condition
''divide-by-zero'' occurs.
(5) Appropriate catch block to handle the exceptions thrown. (12)

14. (a) Explain different types of inheritance with suitable example for each one
of them. (16)
Or
(b) (i) Give the rules for writing virtual functions. (6)
(ii) Write a C++ program to illustrate the use of virtual function. (10)

15. (a) (i) Explain the use of any six manipulators with example. (6)
(ii) Discuss in detail the unformatted I/O operations. (10)
Or
(b) (i) Explain the stream classes for file operations with suitable
diagram. (4)
(ii) Write an interactive, menu-driven C++ program that will access the
database file containing the list of telephone numbers and their
corresponding customer name, and implement the following tasks :
(1) Determine the telephone number of the specified person.
(2) Determine the name if the telephone number is known.
(3) Update the telephone number, whenever, there is a change.(12)

Design And Analysis Of Algorithms - AM10 4th CS2251

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2010
Fourth Semester
Computer Science and Engineering
CS2251 - DESIGN AND ANALYSIS OF ALGORITHMS
(Regulation 2008)



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PART A — (10 × 2 = 20 Marks)

1. Differentiate Time Complexity from Space complexity.
2. What is a Recurrence Equation?
3. What is called Substitution Method?
4. What is an Optimal Solution?
5. Define Multistage Graphs.
6. Define Optimal Binary Search Tree.
7. Differentiate Explicit and Implicit Constraints.
8. What is the difference between a Live Node and a Dead Node?
9. What is a Biconnected Graph?
10. What is a FIFO branch-and-bound algorithm?





PART B — (5 × 16 = 80 Marks)
11. (a) Explain how Time Complexity is calculated. Give an example.[Marks 16]
Or
(b) Elaborate on Asymptotic Notations with examples.[Marks 16]
12. (a) With a suitable algorithm, explain the problem of finding the maximum and minimum items in a set of n elements.[Marks 16]
Or
(b) Explain Merge Sort Problem using divide and conquer technique. Give an example.[Marks 16]
13. (a) Write down and explain the algorithm to solve all pairs shortest paths problem.[Marks 16]
Or
(b) Explain how dynamic programming is applied to solve traveling salesperson problem.[Marks 16]
14. (a) Describe the backtracking solution to solve 8-Queens problem.[Marks 16]
Or
(b) With an example, explain Graph Coloring Algorithm.
15. (a) Explain in detail the Graph Traversals.[Marks 16]
Or
(b) With an example, explain how the branch-and-bound technique is used to solve 0/1 knapsack problem.[Marks 16]

Heat And Mass Transfer 6th AM10 ME9355

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2010
Sixth Semester - 6th
Mechanical Engineering
ME2251/ME9355 — HEAT AND MASS TRANSFER
(Regulation 2008)

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 PART A — (10 × 2 = 20 Marks) 

1. Write the Poisson's equation for heat conduction.
2. What is lumped heat capacity analysis?
3. Define thermal boundary layer thickness.
4. What do you understand by free and forced convection?
5. What is effectiveness of a heat exchange?
6. Give the expression for NTU.
7. Find the temperature of the sun assuming as a black body, if the intensity of  radiation is maximum at the wave length of 0.5µ .
8. State Kirchhoff law.
9. Define molar concentration.
10. What is mass average velocity? 





PART B — (5 × 16 = 80 Marks) 

11. (a) Derive the general heat conduction equation in cylindrical coordinates. (Marks 16)
Or
(b) Derive the general heat conduction equation for a hollow cylinder. (Marks 16)
12. (a) Air at 20°C at 3m/s flows over a thin plate of 2m long and 1m wide. Estimate the boundary layer thickness at the trailing edge, total drag force, mass flow of air between x =30cm and x =80cm. Take 6 ? = 15 ×10 and 3 ? =1.17kg/m . (Marks 16)
Or
(b) Calculate the convective heat transfer from a radiator 0.5m wide and 1m high at 84°C in a room at 20°C. Treat the radiator as a vertical plate. (Marks 16)
13. (a) Dry steam at 2.45 bar condenses on a vertical tube of height of 1m at 117°C. Estimate the thickness of the condensate film and the local heat transfer coefficient at a distance 0.2 m from the upper end of the plate.(Marks 16)
Or
(b) Derive the LMTD for a parallel flow heat exchanger stating the assumptions. (Marks 16)
14. (a) Derive the radiation exchange between
(i) Large parallel gray surfaces and
(ii) Small gray bodies. (Marks 16)
Or
(b) Two large parallel plates of 1m×1m spaced 0.5m apart in a very large room whose walls are at 27°C. The plates are at 900°C and 400°C with emissivities 0.2 and 0.5 respectively. Find the net heat transfer to each plate and to the room. (Marks 16)
15. (a) The temperature recorded by a thermometer whose bulb covered by a wet wick in dry air at atmospheric pressure is 22°C. Estimate the true air temperature. (Marks 16)
Or
(b) Dry air at 27°C and 1 bar flows over a wet plate of 50cm at 50m/s.
Calculate the mass transfer coefficient of water vapor in air at the end of the plate. (Marks 16)

Manufacturing Technology II - 4th AM10 ME2252

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2010
Fourth Semester
Mechanical Engineering
ME2252 MANUFACTURING TECHNOLOGY - II
(Regulation 2008)

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PART A — (10 × 2 = 20 Marks)

1. How do you classify tool wear?
2. Define Tool Life.
3. Distinguish between Capstan lathe from Turret lathe.
4. State the different methods of taper turning.
5. How do you classify milling cutters?
6. Define Broaching.
7. State the applications of honing and lapping finishing methods.
8. Compare gear forming with gear generation method.
9. State the limitations of CNC machine tools.
10. What is a 'Canned' cycle?





PART B — (5 × 16 = 80 Marks)

11. (a) (i) Discuss the various types of chips produced during metal machining. (Marks 6)
(ii) State the parameters that influence the life of tool and discuss. (Marks 10)
Or
(b) (i) What is meant by Orthogonal Cutting and Oblique Cutting? (Marks 6)
(ii) Explain 'Merchant force circle' along with assumptions.(Marks 10)

12. (a) (i) Discuss the main parts of a turret lathe. (Marks 6)
(ii) Explain the working of Swiss type auto lathe with a neat sketch.(10)
Or
(b) (i) What is meant by 'tool layout' of a turret lathe? (Marks 6)
(ii) Name the various lathe accessories. How does a four jaw chuck differ from a three jaw chuck? (10)

13. (a) (i) What are the operations performed on a milling machine? (Marks 6)
(ii) Explain different types of drilling machines with their specific features. (Marks 10)
Or
(b) (i) Discuss the various types of broaches. (Marks 6)
(ii) Discuss the common work holding devices used on shapers, slotters and planers. (Marks 10)

14. (a) (i) Give the specification of grinding wheel. (Marks 6)
(ii) What is meant by dressing and truing of grinding wheel? (Marks 10)
Or
(b) (i) List the advantages and limitations of gear shaping. (Marks 6)
(ii) Explain the principle of gear hobbing with neat sketches. (Marks 10)

15. (a) (i) Under what conditions of production the numerically controlled machine tools are employed? (Marks 6)
(ii) Explain the various elements of NC machine with closed loop control system. (Marks 10)
Or
(b) (i) Explain the main difference between point to point and continuous path type of numerically controlled machine tools. (Marks 6)
(ii) List any five motions and control statements of computer assisted NC programming and explain. (10)

Power Plant Engineering AM10 4th EE2252

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2010
Fourth Semester - 4th
Electrical and Electronics Engineering
EE2252 - POWER PLANT ENGINEERING
(Regulation 2008)

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PART A — (10 × 2 = 20 Marks) 

1. Mention the various modern ash handling systems.
2. What are the factors affecting cooling of water in cooling tower?
3. Enumerate advantages and disadvantages of hydro power plants.
4. What is a surge tank?
5. What are the requirements of fission process?
6. What are the essential components of a nuclear reactor?
7. State the merits and demerits of closed cycle gas turbine over open cycle gas turbine power plant.
8. State the applications of diesel power plant.
9. What is a fuel cell?
10. What are the advantages and limitations of tidal power plant?





PART B — (5 × 16 = 80 Marks)

11. (a) Give the layout of a modern steam power plant and explain it briefly.[Marks 16]
Or
(b) How are cooling towers classified? Explain any one of them with a neat sketch.[Marks 16]

12. (a) Explain with a neat sketch a pumped storage power plant.[Marks 16]
Or
(b) What is the function of a hydraulic turbine? How are the turbines classified? Explain any one with a suitable sketch.[Marks 16]

13. (a) With the help of a sketch show all the important part of nuclear reactor. Describe briefly the functions of each part.[Marks 16]
Or
(b) Explain the following terms: (i) Fission of nuclear fuel (ii) Distribution of fission energy (iii) The chain reaction. [Marks 16]

14. (a) Discuss briefly the methods employed for improvement of thermal efficiency of open gas turbine power plant.[Marks 16]
Or
(b) List the essential components of a diesel power plant and explain them briefly.[Marks 16]

15. (a) Explain with a neat diagram of wind electric generating power plant.[Marks 16]
Or
(b) Describe open cycle MHD system with suitable sketch.[Marks 16]

Computer Organization And Architecture -4th AM10 CS2253

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2010
Fourth Semester
Computer Science and Engineering
CS2253 — COMPUTER ORGANIZATION AND ARCHITECTURE
(Common to Information Technology)
(Regulation 2008)

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PART A — (10 × 2 = 20 Marks)

1. Distinguish between autoincrement and autodecrement addressing mode.
2. Compare RISC with CISC architecture.
3. Under what situations the micro program counter is not incremented after a new instruction is fetched from micro program memory?
4. What are the relative merits of horizontal and vertical microinstruction format?
5. What is pipelining and what are the advantages of pipelining?
6. List the key aspects in gaining the performance in pipelined systems.
7. How many memory chips are needed to construct 2 M × 16 memory system using 512 K × 8 static memory chips?
8. What is virtual memory and what are the benefits of virtual memory?
9. What is meant by bus arbitration?
10. Name and give the purpose of widely used bus standard.





PART B — (5 × 16 = 80 Marks)

11. (a) (i) Describe the role of system software to improve the performance of a computer. (Marks 8)
(ii) Design a 4-bit adder/subtracter circuit using full adders and explain its function. (Marks 8)
Or
(b) (i) What are the special registers in a typical computer? Explain their purposes in detail. (Marks 8)
(ii) Design a 4-bit fast adder and explain its function in detail. (Marks 8)

12. (a) (i) Draw and explain the block diagram of a complete processor. (Marks 6)
(ii) Briefly describe the design of a hardwired control unit. (Marks 10)
Or
(b) (i) Explain the basic organization of a microprogrammed control unit and the generation of control signals using microprogram. (Marks 12)
(ii) What are the advantages and disadvantages of hardwired and microprogrammed control? (Marks 4)

13. (a) (i) Describe the role of cache memory in pipelined system. (Marks 8)
(ii) Discuss the influence of pipelining on instruction set design. (Marks 8)
Or
(b) What is instruction hazard? Explain the methods for dealing with the instruction hazards. (Marks 16)

14. (a) (i) What are the different secondary storage devices? Elaborate on any one of the devices. (Marks 8)
(ii) Explain how the virtual address is converted into real address in a paged virtual memory system. (8)
Or
(b) (i) Explain approaches for addressing multiple-module memory systems with suitable diagrams. (6)
(ii) Briefly describe magnetic disk principles and also the organization and accessing of data on a disk. (Marks 10)

15. (a) (i) Describe the hardware mechanism for handling multiple interrupt requests. (Marks 8)
(ii) What are handshaking signals? Explain the handshake control of data transfer during input and output operation. (Marks 8)
Or
(b) (i) What are the needs for input-output interface? Explain the functions of a typical 8-bit parallel interface in detail. (Marks 10)
(ii) Describe the USB architecture with the help of a neat diagram. (Marks 6)

Instrumental Method Of Analysis - CY9213

B.TECH DEGREE EXAMINATION DEC-2010
THIRD SEMESTER
CY 9213 INSTRUMENTAL METHOD OF ANALYSIS

PART A-(10*2=20MARKS)

1. What are the advantages of doubhle beam spectrometer over single beam spectrometer?

2. Which among the following is IR active? Why?
a.carbon dioxide
b.nitrogen

c.hydrogen
3. What is meant by excitation interference and how is it eliminated?
4. How will you carry out the quantitative analysis of two component system where there is a single way overlap?
5. what is the difference between DTA and DSC.
6. Write differences between Raman and IR spectroscopic techniques.
7. Why is it necessary to use a guard column in HPLC?
8. Define Rt, Rv,and Rf.
9. Draw the energy level diagrams of iodomethane and methane
10. Write the chemical reactions involved in the determination of nitrite.





Part B [5*16=80marks]

11. Derive Beer-Lambert equation and discuss the various deviations[Marks 16]

12(Ia)(i) Draw and explain all the spectrophotometric titration curves.[Marks 8]
(ii) Discuss the methodology of determination of nickel ion present in water by using visible spectrophotometer.[Marks 8]
(or)
12(b) Calculate the lambda max for the compounds using Woodward Fieser rules[Marks 16]

13(a) With a schematic of an atomic absorption spectrophotometer, explain the principle, instrumentation and interferences.[Marks 16]
(or)
13(b) Discuss theory, principle and applications of IR spectrophotometry.[Marks 16]

14(a)(i) Explain the technique of Raman spectrophotometry[Marks 8]
(ii)Write the differences between AAS and FES.[Marks 8]
(or)
14(b) Discuss the instrumentation of TGA and explain each portions of the thermo grams of any two organic compounds.[Marks 16]

15(a)(i) Discuss the theory of separation of any mixture using column chromatography.[Marks 8]
(ii)How will you separate the mixture of Cu, Co, Ni using paper chromatography.[Marks 8]
or
15(b) with a schematic of a HPLC discuss the theory of separation, instrumentation and applications of HPLC[Marks 16]

VLSI Design - 7th ND09 EC1401

B.E/B.Tech Degree Examination, November/December 2009.
Seventh Semester - 7th
Electronics and Communication Engineering
EC1401 - VLSI DESIGN
(Common to B.E.(Part-Time) Sixth Semester Regulation 2005)
(Regulation 2004)

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Part A-(10*2=20 marks)

1.What are the different MOS layers?
2.What are the two types of layout design rules?
3.Define rise time and fall time.
4.What is a pull down device?
5.What are the difference between task and function?
6.What is the difference between === and == ?
7.What is CBIC ?
8.Draw an assert high switch condition if input = 0 and input =1.
9.What do you mean by DFT?
10.Draw the boundary scan input logic diagram.





Part B - (5*16=80 marks)

11.a) Discuss the steps involved in IC fabrication process.(16)
Or
b) Describe n-well process in detail.(16)

12.a)i)Explain the DC characteristics of CMOS inverter with neat sketch.(8)
ii)Explain channel length modulation and body effect.(8)
Or
b)i)Explain the different regions of operation in a MOS transistor.(10)
ii)Write a note on MOS models.(6)

13.a)Explain in detail any five operators used in HDL .(16)
Or
b)i)Write the verilog code for 4 bit ripple carry full adder.(10)
ii)Give the structural description for priority encoder using verilog.(6)

14.a)Explain in detail the sequence of steps to design an ASIC.(16)
Or
b)Describe in detail the chip with programmable logic structures.(16)

15.a)Explain in detail Scan Based Test Techniques.(16)
Or
b)Discuss the three main design strategies for testability.(16)

Electronic Circuits I 3rd ND09 EC9202

ANNA UNIVERSITY – CHENNAI
B.E.\B.TECH DEGREE EXAMINATION DECEMBER 2009
3rd - THIRD SEMESTER
ELECTRONICS and COMMUNICATIONS ENGINEERING.
EC9202 ELECTRONIC CIRCUITS - I

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PART A-(2*10=20)

1. Define stability factor.
2. Draw the fixed bias single stage transistor circuit.
3. Define CMRR.
4. Draw the small signal equivalent circuit of FET.
5. Two amplifiers having gain 20db and 40db are cascaded. Find the overall gain in db.
6. Define bandwidth.
7. What is theoretical maximum conversion efficiency of class A power amplifier.
8. What is distortion in power amplifiers.
9. Draw the full wave bridge rectifier circuit.
10. What are the advantages of SMPS over conventional regulators.





PART B-(5*16=80)

11. A) (i) For the transistor circuit in fig. find the Q-point. Vcc=15v, B=100, VBE=0.7V
(ii) Calculate the stability factor for a fixed bias circuit.
(Or)
B) Discuss the various techniques of stabilization of Q-point in a transistor.

12. A) For the CC transistor amplifier circuit, find the expressions for input impedance and voltage gain. Assume suitable model for transistor.
(Or)
B) (i) Discuss the working of a basic emitter coupled differential amplifier circuit (8)
(ii) Compare CB, CE and CC amplifiers. (8)

13. A) (i) Discuss the frequency response of multistage amplifiers. Calculate the overall upper and lower cutoff frequencies. (10)
(ii) Discuss the terms rise time and sag. (6) (Or)
B) Discuss the high frequency equivalent circuit of FET and hence derive gain bandwidth product for any one configuration.

14. A) (i) Derive the theoretical max conversion efficiency of class B power amplifier. (10)
(ii) Write short notes on power MOSFET amplifier. (6) (Or)
B) Describe the distortion in power amplifier and the methods to eliminate the same.

15. A) Explain the circuit of voltage regulator and also discuss the short circuit protection mechanism. (Or)
B) (i) Explain the power control method using SCR.
(ii) Design zener regulator for following specification Vin=8v to 12v; Vo=10v, RL=10kO. Assume that zener diode is ideal.

Control System - ND09 5th EC9254

ANNA UNIVERSITY – COIMBATORE
B.E.\B.TECH DEGREE EXAMINATION DECEMBER 2009
FIFTH SEMESTER - 5th
ELECTRONICS and COMMUNICATION ENGG.
CONTROL SYSTEMS - EC9254

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PART A-(2*20=40)

1. What is the use of mason’s gain formula.
2. Give two examples for open loop and closed loop systems.
3. What do you meant by analogous systems.
4. What are the frequency domain specifications.
5. What are the advantages and disadvantages of feedback control systems.
6. How can we classify second order system based on damping ratio.
7. Define gain margin.
8. Define resonant frequency.
9. State Routh stability criterion.
10. Define Nyquist stability criterion.
11. What are the difference between state space analysis and Transfer function analysis.
12. What are root loci.
13. What is servomechanism.
14. What are the different types of controller.
15. What is synchro.
16. Name the test signals used in control systems.
17. What is polar plot.
18. Give examples for frequency response plot.
19. Write down state mode and output model of state space systems.
20. What do you mean by decomposition of transfer function.





PART B-(5*12=60)

21. A) A unity feedback system has an open loop transfer function G(s)=k/s(s+10). If the damping ratio is 0.5 determine (i) the value of k, (ii) peak overshoot, (iii) time to peak overshoot, (iv) settling time. (8) B) For a unity feedback whose G(s)=1/s(s+1) the input signal is r(t)= 4+6t+2t3. Find the generalized error coefficients. (4)

22. For the given block diagram find corresponding signal flow graph and evaluate closed loop transfer function relating to output and input.

23. Determine the value of k for a unity feedback control system have open loop transfer function G(s)H(s)=k/s(s+2)(s+4) such that (i)gain margin =20db (ii) phase margin =600.

24. Investigate the F(s) for stability using RH criterion (i) F(s) =s4+ks2+(k+1)s+2 (ii) F(s)=s4+s3+3s2+s+6 (iii) F(s)=s5+s4+2s3+2s2+6s+6

25. Obtain the state space model of the system with transfer function C(s)=s2+3s+2 in phase Variable form. R(s) s2+7s+12

26. A system characterized by the following state equation
Find (i) Transfer function of the system (ii) State transition matrix.

27. Sketch the root locus for the system with characteristic equation 1+G(s)H(s)=K(s+2)(s+3)(s+1)(s-1)

28. Find transfer function of field controlled DC servo motor.