LINEAR INTEGRATED CIRCUITS AND APPLICATIONS EE2254 ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER | EE2254 LICA PREVIOUS YEAR QUESTION PAPER NOVEMBER/DECEMBER 2011

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.

Fourth Semester

Electrical and Electronics Engineering

EE 2254 — LINEAR INTEGRATED CIRCUITS AND APPLICATIONS

(Common to Instrumentation & Control Engineering and Electronics &

Instrumentation Engineering)

(Regulation 2008)

Time : Three hours Maximum : 100 marks

Answer ALL questions.

PART A — (10 × 2 = 20 marks)

1. List the basic processes used in IC Fabrication.
2. What is meant by ion implantation?
3. What is thermal drift?
4. Define Input offset voltage.
5. Draw the circuit of first order active filter.
6. Draw the circuit diagram of sample and hold circuit.
7. Define capture range of PLL.
8. What are one, two and four quadrant multipliers?
9. What are the disadvantages of linear voltage regulators?
10. What is isolation amplifier?

PART B — (5 × 16 = 80 marks)

11. (a) (i) Explain the process of epitaxial growth in IC fabrication process with neat diagrams. (8)
(ii) With neat sketches explain the fabrication of diodes. (8)

Or

(b) (i) Explain the different isolation techniques. (8)
(ii) Describe in detail about the diffusion process of IC fabrication.(8)
12. (a) Explain in detail about the frequency compensation applied to operational amplifiers. (16)

Or

(b) Draw and explain the working of operational amplifier as 
(i) Integrator. (8)
(ii) Differentiator. (8)
13. (a) Explain the following applications of operational amplifiers.
(i) Voltage to current converter. (8)
(ii) Clamper. (8)

Or

(b) Explain in detail the working of
(i) Weighted resistor type DAC. (8)
(ii) Dual slope type ADC. (8)
14. (a) (i) Explain the working of voltage controlled oscillators. (8)
(ii) What is PLL? Explain its application as frequency multiplier. (8)

Or

(b) Explain the astable and bistable operation of IC 555 with necessarywaveforms. (16)
15. (a) Draw and explain the application of IC 723 as low voltage regulator and high voltage regulator. (16)

Or

(b) (i) Explain the block diagram of ICL 8038 function generator IC. (8)
(ii) Write short notes on opto couplers. (8)

HIGH VOLTAGE ENGINEERING EE2353 ANNA UNIVERSITY QUESTION PAPER | EE2353 HIGH VOLTAGE ENGINEERING ANNA UNIVERSITY NOV/DEC 2011 QUESTION PAPER

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.

Sixth Semester

Electrical and Electronics Engineering

EE 2353 — HIGH VOLTAGE ENGINEERING

(Regulation 2008)

Time : Three hours Maximum : 100 marks

Answer ALL questions.

PART A — (10 × 2 = 20 marks)

1. What are the causes of over voltages in power system?
2. What is counter poise wire? Give its use.
3. Write the Paschen’s law.
4. What are two main reasons for long term break down in composite dielectrics?
5. Give the specifications for standard impulse wave.
6. What are the advantages of cascaded transformer method?
7. What is Rogowski coil? Give its limitations.
8. What are the limitations of series resistance micro ammeter method?
9. What are the tests conducted on surge arrester?
10. What is insulation coordination?

PART B — (5 × 16 = 80 marks)

11. (a) (i) Give the origin and characteristics of switching surges and explain the causes of over voltage due to switching surges in EHV and UHV system. (10)
(ii) Explain the control measures for over voltage due to switching surge. (6)

Or

(b) Elaborate the discussion on protection of power system equipments using protective devices. (16)
12. (a) Explain in detail the breakdown mechanism in non-uniform fields and phenomenon of Corona. (16)

Or

(b) (i) Describe the ageing and breakdown in composite dielectrics due to partial discharge. (8)
(ii) Describe the thermal breakdown mechanism of solid dielectrics. (8)
13. (a) (i) Explain the operation of simple voltage doubler circuit. (4)
(ii) Discuss the principle of operation of vande graff generator with neat sketch. (12)

Or

(b) (i) How the impulse current is generated using capacitor bank. Explain in detail. (8)
(ii) Write a brief note on resonant transformer method. (8)
14. (a) Tabulate and explain the methods used for the measurement of high voltages and high currents. (16)
Or
(b) With neat sketch explain the sphere gap arrangement method of high voltage
measurement and give the factors influencing the measurement. (16)
15. (a) Explain the power frequency and impulse voltage test conducted on bushings.

Or

(b) Discuss the dielectric power factor test and partial discharge test conducted on high voltage cables. (16)
———————––––

ELECTRICAL ENGINEERING EC2201 ANNA UNIVERSITY NOVEMBER/DECEMBER 2011 QUESTION PAPER | EC2201 ELECTRICAL ENGINEERING ANNA UNIVERSITY QUESTION PAPER

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.

Third Semester

Electronics and Communication Engineering

EC 2201 — ELECTRICAL ENGINEERING

(Regulation 2008)

Time : Three hours Maximum : 100 marks

Answer ALL questions.

PART A — (10 × 2 = 20 marks)

1. Draw the external characteristics of a DC series generator.
2. What do you mean by Back emf?
3. What is the purpose of conducting short-circuit test on a Transformer?
4. Define transformation ratio of the transformer.
5. A 6 pole, 3-phase Induction motor operating on a 50 Hz supply has a rotor
emf frequency as 2 Hz. Determine the rotor speed.
6. What are the types of induction motor?
7. What is the principle of hysterisis motor?
8. What is meant by pitch factor?
9. Draw the one line diagram of a power station with output transformer.
10. Compare AC and DC transmission system.


PART B — (5 × 16 = 80 marks)


11. (a) Explain the constructional details of a DC machine with neat diagrams. (16)

Or

(b) (i) Explain the principle of operation of DC motor with relevant diagrams. (8)
(ii) Explain the procedure for Swinburne’s test. How to find the efficiency of a DC Motor and DC generator using this test? (8)
12. (a) (i) Explain the operation of transformer on no load and on load with vector diagrams. (10)
(ii) Derive the emf equation of a transformer. (6)

Or

(b) (i) Explain the open circuit and short circuit test on transformers.(8)
(ii) Derive the transformer equivalent circuit. (8)
13. (a) (i) Explain the principle of operation of three phase induction motor. (8)
(ii) A single phase equivalent circuit of a 6-pole SCIM that operates from a 220 V line voltage at 60 Hz is given below. Calculate the stator current, output power, torque and efficiency at a slip of 2.5%. The fixed winding and friction losses are 350 W. Neglect the core loss. (8)

Or

(b) (i) Explain any two methods of speed control of induction motor from stator side. (8)
(ii) Describe why single phase induction motors are not self starting by using double field revolving theory. (8)


14. (a) (i) Explain the tests to be conducted for finding the voltage regulation in a three phase synchronous generator emf method.(6)
(ii) A three-phase star connected generator has a terminal voltage of 3300 V and delivers a full-load current of 100 A. On short circuit a field current of 5 A was necessary to produce the full load current. The emf on open circuit for the same excitation was 900 V. The armature resistance was 0.8 ohms/phase.
Determine the full load voltage regulation (1) 0.8 pf lagging and(2) 0.8 pf leading. (10)

Or

(b) (i) Explain the construction and working principle of Reluctance motor. (8)
(ii) What is the principle of stepper motor? Describe the working of variable reluctance type Stepper motor. (8)
15. (a) (i) Explain any four type types of insulators used for overhead transmission systems. (8)
(ii) Explain with a neat sketch the Layout of hydel power plant. (8)

Or

(b) Draw the schematic layout of a substation and hence explain the various instruments associated with it. (16)

ELECTROMAGNETIC THEORY EE2202 ANNA UNIVERSITY NOVEMBER/DECEMBER 2011 QUESTION PAPER | EE2202 ELECTROMAGNETIC THEORY NOVEMBER/DECEMBER 2011. MODEL QUESTION PAPER

 B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.

Third Semester

Electrical and Electronics Engineering

EE 2202 — ELECTROMAGNETIC THEORY

(Regulation 2008)

Time : Three hours Maximum : 100 marks

Answer ALL questions.

PART A — (10 × 2 = 20 marks)

1. Define Divergence.
2. State Divergence theorem.
3. What is meant by equipotential surface?
4. Electric field is conservative field. Justify.
5. What is the point form of Ampere’s Circuital Law?
6. Distinguish scalar and Vector Magnetic Potential.
7. Give Lorentz force equation.
8. Compare circuit and field theory
9. What are the standing waves?
10. Give the applications of wave guides.

PART B — (5 × 16 = 80 marks)

Or
(b) Explain in detail line, surface and volume integrals of vector functions.
12. (a) Apply Gauss’s law to an
(i) infinite line charge
(ii) infinite sheet of charge.
Or
(b) (i) Derive Potential distribution in a coaxial conductor. 
(ii) The interface between a dielectric medium having relative permittivity 4 and free space is marked the y = 0 plane. If the electric field next to the interface in the free space region is

given by determine E field on the other side of the interface.






13. (a) Derive the boundary conditions to explain the behavior of magnetic
field at the interface of two magnetic media.
Or

(b) Derive an expression for energy density in a magnetic field.  
14. (a) Derive the Maxwell's equations is Integral and point forms.
Or

(b) (i) In a charge free non magnetic dielectric region, the magnetic field is given by  
Calculate the dielectric constant of the medium and also the
displacement current density.
(ii) A conducting circular loop of radius ‘a has its centre at the
origin and its axis makes an angle θ with the z axis. The loop is
placed in a magnetic field
Z a ft B B ˆ . 2 cos
0 π =
r
Wb/m2
(1) Derive the expression for the induced voltage on the loop.
(2) If the peak to peak voltage is l6 mV at a frequency of 1 KHz when the loop lies in the xy plane, determine the loop radius given that = 0 B 10 mwb/m2
15. (a) Explain in detail the behavior of plane waves in lossless medium.
Or
(b) Explain Poynting Vector and Power Flow in Electromagnetic Fields.

ELECTRICAL ENGINEERING ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER EC2201 ELECTRICAL ENGINEERING, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR ECE DEPARTMENT

ELECTRICAL ENGINEERING ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER EC2201 ELECTRICAL ENGINEERING, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR ECE DEPARTMENT

EC2201 ELECTRICAL ENGINEERING ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER  ELECTRICAL ENGINEERING, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR ECE DEPARTMENT

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2009

Third Semester

Electronics and Communication Engineering

EC 2201 — ELECTRICAL ENGINEERING

(Regulation 2008)

Time : Three hours Maximum : 100 Marks

Answer ALL Questions

PART A — (10 × 2 = 20 Marks)

1. What are the functions of yoke in a D.C. machine?
2. List the methods of speed control of a D.C. shunt motor.
3. Write down the emf equations of a single phase transformer.
4. Give the expression for percentage voltage regulation of a single phase
transformer.
5. Define the slip of a three phase induction motor.
6. List the types of starters used to start three phase induction motors.
7. What are the two types of synchronous machines?
8. Give the applications of stepper motors.
9. Why are high voltages preferred for the transmission of electrical power?
10. List the components in a substation.

PART B — (5 × 16 = 80 Marks)

11. (a) (i) With a neat sketch explain the constructional details of a D.C.
machine. (12)
(ii) Draw and explain the internal and external characteristics of a
D.C. shunt generator. (4)
Or
(b) (i) Derive the torque equation of a D.C. motor. (6)
(ii) With a neat sketch explain the operation of a three point starter for
a D.C. motor. (10)
12. (a) Explain the principle of operation of a single phase transformer and its
behaviour on loaded condition with phasor diagram. (16)
Or
(b) (i) Develop the equivalent circuit of a transformer. (8)
(ii) Explain the O.C. and S.C. tests done on a single phase transformer.
(8)
13. (a) (i) With neat sketches explain the construction of three phase slip ring
and squirrel cage induction motors. (10)
(ii) Compare the slip ring and squirrel cage rotors. (6)
Or
(b) (i) Explain the auto transformer and star delta starters used to start
the three phase induction motors. (8)
(ii) Explain the principle of operation of a shaded pole single phase
induction motor. (8)
14. (a) (i) Derive the expression for the induced emf of a synchronous
generator. (8)
(ii) Explain the construction and operation of a reluctance motor. (8)
Or
(b) (i) Explain the method of obtaining the voltage regulation of a
synchronous generator using EMF method. (10)
(ii) Explain the construction and operation of a hysterisis motor. (6)
15. (a) (i) Explain the structure of a electrical power system indicating the
generation, transmission and distribution section. (10)
(ii) Draw and explain the layout of a single bus bar substation. (6)
Or
(b) (i) Discuss the advantages and disadvantages of EHVAC and EHVDC
systems. (10)
(ii) Explain the construction of any one type of cables used for EHV
systems. (6)

EE2255 DIGITAL LOGIC CIRCUITS NOV/DEC 2010 ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

EE 2255 DIGITAL LOGIC CIRCUITS NOV/DEC 2010 ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER EE2255 DIGITAL LOGIC CIRCUITS NOV/DEC 2010 , IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010

Fourth Semester

Electrical and Electronics Engineering

EE 2255 — DIGITAL LOGIC CIRCUITS

(Regulation 2008)

Time : Three hours Maximum : 100 Marks

Answer ALL questions

PART A — (10 × 2 = 20 Marks)

1. Show that Excess-3 code is self complementing.
2. Add the hexadecimal numbers: 93 and DE.
3. Convert JK flip-flop to T-flip-flop.
4. Mention the major application of Master Slave FF.
5. Draw the state diagram of SR Flip Flop.
6. Define asynchronous sequential machine.
7. State the important characteristics of TTL family.
8. In which type of TTL gate wired ANS logic is possible?
9. Write the VHDL code for AND gate.
10. List the operators available in VHDL.
PART B — (5 × 16 = 80 Marks)
11. (a) Reduce the following using tabulation method and verify with K maps.
( ) ( ) ∑ = 14 , 12 , 10 , 8 , 6 , 4 , 3 , 2 , 1 , 0 , , , D C B A F
Or
(b) Obtain the minimum SOP using Quine Mcclusky’s method and verify
using ‘K’ map for the following.
13 12 11 10 9 8 4 2 0
m m m m m m m m m F + + + + + + + + = .
12. (a) Design a counter with the sequence 0, 1, 3, 7, 6, 4, 0.
Or
(b) The following sequence is to be realized by a counter consisting of
3 JKFF’s.
A1 0 0 0 0 1 1 0
A2 0 1 1 0 0 1 0
A3 0 1 0 1 1 0 0
Design the counter.
13. (a) (i) List and explain the steps used for analyzing an asynchronous
sequential circuit. (8)
(ii) Describe procedure to get state table from excitation table in an
asynchronous sequential circuit. How does it differ from
synchronous sequential circuit? (8)
Or
(b) (i) How do you get output specifications from a flow table in
asynchronous sequential circuit operating in fundamental mode? (6)
(ii) When do you get the critical and non-critical races? How will you
obtain race free conditions? (10)
14. (a) (i) Explain the concept, working and characteristics of TTL logic
families. (8)
(ii) What do you understand by FPGA? Explain the operation and
applications? (8)
Or
(b) (i) Describe the working of EPROM. List the applications of EPROM.
(8)
(ii) Discuss on the concept, operation and characteristics of CMOS
technology. (8)
15. (a) Construct a VHDL module listing for a 16:1 MUX that is based on the
assign statement. Use a 4-bit select word S3 S2 S1 S0 to map the selected
input Pi (i = 0,...15) to the output.
Or
(b) (i) Explain the design procedure of RTL using VHDL. (10)
(ii) Write a note on VHDL test benches. (6)

EE2254 LINEAR INTEGRATED CIRCUITS AND APPLICATIONS NOV/DEC 2010 ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

EE 2254 LINEAR INTEGRATED CIRCUITS AND APPLICATIONS NOV/DEC 2010 ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT


ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER EE2254 LINEAR INTEGRATED CIRCUITS AND APPLICATIONS NOV/DEC 2010 , IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010

Fourth Semester

Electrical and Electronics Engineering

EE 2254 — LINEAR INTEGRATED CIRCUITS AND APPLICATIONS

(Common to Instrumentation and Control Engineering and Electronics and

Instrumentation Engineering)

(Regulation 2008)

Time : Three hours Maximum : 100 Marks

Answer ALL questions

PART A — (10 × 2 = 20 Marks)

1. Give the difference between monolithic and hybrid ICs.
2. What is lithography?
3. Give the ideal characteristics of operational amplifier and give its equivalent
circuit.
4. Draw the circuit diagram of an integrator and give its output equation.
5. Draw the circuit diagram of an op-amp based positive clipper.
6. Which is the fastest ADC and why?
7. List the applications of NE 565.
8. Draw the relation between the capture range and lock range relationship in a PLL.
9. How will you increase the output of a general purpose op-amp?
10. Using LM380 draw the circuit for audio power amplifier.

PART B — (5 × 16 = 80 Marks)

11. (a) (i) Briefly explain the various types of IC packages. Mention the
criteria for selecting an IC package. (8)
(ii) Write short notes on classification of Integrated circuits. (8)
Or
(b) With respect to the BJT based circuit given below, explain the various
steps to implement the circuit into a monolithic IC. (16)
12. (a) (i) With neat diagrams explain the types of feedback configurations
available. (8)
(ii) Briefly explain summing amplifier. Draw an adder circuit for the
given expression ) 5 1 . 0 ( 3 2 1
V V V V
o + + − = . (8)
Or
(b) Briefly explain the frequency response of op-amp. Give the frequency
compensation techniques adopted in operational amplifiers. (16)
13. (a) (i) Explain the first order lowpass Butterworth filter with a neat
circuit diagram. Derive its frequency response and plot the same. (8)
(ii) Design a lowpass filter with a cutoff frequency of 1 kHz and with a
passband gain of 2. (8)
Or
(b) What is an instrumentation amplifier? Give the important features of an
instrumentation amplifier. Explain the working of three op-amp
instrumentation amplifier. Give its application. (16)
14. (a) (i) Explain the Voltage Controlled Oscillator with a neat block
diagram. Give its typical connection diagram and its output
waveforms. (8)
(ii) Derive the expression for capture range for PLL where a simple
RC network is used as a LPF. (8)
Or
(b) Draw the functional diagram of IC 555 Timer. Explain with a circuit
diagram how it can be connected for monostable operation. (16)
15. (a) (i) Explain the working of series voltage regulator. (8)
(ii) Write a note on optocouplers. (8)
Or
(b) What is a switching regulator? With a neat block diagram explain the
internals of A µ 7840. (16)

EE2252 POWER PLANT ENGINEERING APRIL/MAY 2011 ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

EE 2252 POWER PLANT ENGINEERING APRIL/MAY 2011 ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER EE2252 POWER PLANT ENGINEERING APRIL/MAY 2011 , IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2011

Fourth Semester

Electrical and Electronics Engineering

EE 2252 — POWER PLANT ENGINEERING

(Regulation 2008)

Time : Three hours Maximum : 100 marks

Answer ALL questions

PART A — (10 × 2 = 20 marks)

1. State and explain the Carnot cycle process.

2. Define boiler mountings and boiler accessories.
3. Mention the merits of hydro electric power plants.
4. Classify the hydro electric turbines with respect to high medium and low head.
5. What is nuclear fission?
6. State the fuels used in the gas turbine power plants.
7. Distinguish between PHWR and LMFBR.
8. What is meant by combined cycle power plant?
9. State the application of solar thermal system.
10. What are the different types of geothermal fluid and give its temperature
range.
PART B — (5 × 16 = 80 marks)
11. (a) Draw a Rankin cycle for a coal fired and steam thermal power plant.
State the means of increasing the efficiency of the plant.
Or
(b) Explain in detail the coal handling system with suitable block diagram.
12. (a) With a neat sketch explain in detail the construction and working
principle of Hydro electric power plant.
Or
(b) Neatly explain the hydro electric energy resources in India.
13. (a) Write a detailed technical note on the following : (8 + 1)
(i) Boiling water reactor
(ii) Gas cooled reactor.
Or
(b) Explain the importance of nuclear waste management.
14. (a) Write a detailed technical note on the following : (8 + 8)
(i) Reheating
(ii) Regeneration.
Or
(b) With a neat sketch explain in detail, about the component and layout of
Diesel engine power plant.
15. (a) Explain in detail, about the various types of wind Energy system.
Or
(b) Classify and explain in detail about the Tidal Energy Conversion System.

EE2251 ELECTRICAL MACHINES — I ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

EE 2251 ELECTRICAL MACHINES — I ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER EE2251 ELECTRICAL MACHINES — I, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2011

Fourth Semester

Electrical and Electronics Engineering

EE 2251 — ELECTRICAL MACHINES — I

(Regulation 2008)

Time : Three hours Maximum : 100 marks

Answer ALL questions

PART A — (10 × 2 = 20 marks)

1. What are the three types of basic rotating electric machines?
2. A conductor 80 cm long moves at right angle to its length at a constant speed of
30 m/s in a uniform magnetic field of flux density 1.2 T. Find the emf induced
when the conductor motion is normal to the field flux.
3. Which equivalent circuit parameters can be determined from the open-circuit
test on a transformer?
4. The emf per turn for a single-phase 2200/220 V, 50 Hz transformer is 11 V.
Calculate the number of primary and secondary turns.
5. Based on the principle of conservation of energy, write an energy balance
equation for a motor.
6. What are the three basic principles for the electromechanical energy
conversion?
7. What is magnetic leakage flux?
8. Why is the efficiency of a three-phase induction motor less than that of a threephase
transformer?
9. Draw the circuit model of dc shunt motor.
10. What is the function of no-volt release in a three-point starter?
PART B — (5 × 16 = 80 marks)
11. (a) (i) Discuss in detail the magnetic circuits and the electrical analog of
magnetic circuits. (10)
(ii) What is eddy-current? Explain in detail the eddy-current loss. (6)
Or
(b) (i) Explain the power losses that occur in a magnetic material when it
undergoes cyclic magnetization. (10)
(ii) The total core loss of a specimen of silicon steel is found to be
1500 W at 50 Hz. Keeping the flux density constant the loss
becomes 3000 W when the frequency is raised to 75 Hz. Calculate
separately the hysteresis and eddy current loss at each of those
frequencies. (6)
12. (a) The following data were obtained on a 20 kVA, 50 Hz, 2000/200 V
distribution transformer :
Voltage (V) Current (A) Power (W)
OC test with HV open-circuited 200 4 120
SC test with LV short-circuited 60 10 300
Draw the approximate equivalent circuit of the transformer referred to
the HV and LV sides respectively. (16)
Or
(b) (i) A 3-phase transformer bank consisting of three 1-phase
transformers is used to step-down the voltage of a 3-phase, 6600 V
transmission line. If the primary line current is 10 A, calculate the
secondary line voltage, line current and output kVA for the
following connections :
(1) / Y and
(2) Y / . The turn’s ratio is 12. Neglect losses. (8)
(ii) A 20 kVA, 2500/500 V, single-phase transformer has the following
parameters :
HV winding : r1 = 8 and x1 = 17
LV winding : r2 = 0.3 and x2= 0.7
Find the voltage regulation and the secondary terminal voltage at
full load for a pf of 0.8 lagging and 0.8 leading. The primary voltage
is held constant at 2500 V. (8)
13. (a) (i) Describe the flow of energy in electromechanical devices. (6)
(ii) Discuss about the ‘field energy’ and ‘coenergy’ in magnetic system.
(4)
(iii) The magnetic flux density on the surface of an iron face is 1.6 T
which is a typical saturation level value for ferromagnetic material.
Find the force density on the iron face. (6)
Or
(b) A doubly-excited magnetic field system has coil self- and mutualinductances
of
L11 = L22 = 2H and L12 = L21 = θ cos
Where θ is the angle between the axes of the coils.
(i) The coils are connected in parallel to a voltage source t V v
m
ω sin = .
Derive an expression for the instantaneous torque as a function of
the angular position θ. Find there from the time-average torque.
Evaluate for θ = 30°, t v 314 sin 100 = . (8)
(ii) If coil 2 is shorted while coil 1 carries a current of t I i
m
ω sin 1
= ,
derive expressions for the instantaneous and time-average torques.
Compute the value of the time-average torque when θ = 45° and
t i 314 sin 2 1
= . (8)
14. (a) (i) A 3-phase, 50 Hz. star-connected alternator with 2-layer winding is
running at 600 rpm. It has 12 turns/coil, 4 slots/pole/phase and a
coil-pitch of 10 slots. If the flux/pole is 0.035 Wb sinusoidally
distributed, find the phase and line emf’s induced. Assume that the
total turns/phase are series connected. (8)
(ii) A 4-pole, lap-wound dc machine has 728 armature conductors. Its
field winding is excited from a dc source to create an air-gap flux of
32 mWb/pole. The machine (generator) is run from a prime mover
(diesel engine) at 1600 rpm. It supplies a current of 100 A to an
electric load.
(1) Calculate the electromagnetic power developed. (4)
(2) What is the mechanical power that is fed from the primemover
to the generator? (2)
(3) What is the torque provided by the prime mover? (2)
Or
(b) (i) A 3-phase, 50 kW, 4-pole, 50 Hz induction motor has a winding (ac)
designed for delta connection. The winding has 24 conductors per
slot arranged in 60 slots. The rms value of the line current is 48 A.
Find the fundamental of the mmf wave of phase-A when the current
is passing through its maximum value. What is the speed and peak
value of the resultant mmf/pole? (12)
(ii) A 4-pole synchronous generator driven at 1500 rpm feeds a 6-pole
induction motor which is loaded to run at a slip of 5%. What is the
motor speed? (4)
15. (a) (i) A 220 V dc generator supplies 4 kW at a terminal voltage of 220 V.
the armature resistance being 0.4 . If the machine is now
operated as a motor at the same terminal voltage with the same
armature current, calculate the ratio of generator speed to motor
speed. Assume that the flux/pole is made to increase by 10% as the
operation is changed over from generator to motor. (6)
(ii) A 220 V, 7.5 kW series motor is mechanically coupled to a fan.
When running at 400 rpm the motor draws 30 A from the mains
(220 V). The torque required by the fan is proportional to the square
of speed. Ra = 0.6 , Rse = 0.4 . Neglect armature reaction and
rotational loss. Also assume the magnetization characteristic of the
motor to be linear.
(1) Determine the power delivered to the fan and torque
developed by the motor. (5)
(2) Calculate the external resistance to be added in series to the
armature circuit to reduce the fan speed to 200 rpm. (5)
Or
(b) A 250-V dc shunt motor has Rf = 150 and Ra = 0.6 . The motor
operates on no-load with a full field flux at its base speed of 1000 rpm
with Ia = 5 A. If the machine drives a load requiring a torque of 100 Nm,
calculate armature current and speed of motor. If the motor is required to
develop 10 kW at 1200 rpm what is the required value of the external
series resistance in the field circuit? Assume linear magnetization.
Neglect saturation and armature reaction. (16)

EE2204 DATA STRUCTURES AND ALGORITHMS ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER NOV/DEC 2009, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

EE2204 DATA STRUCTURES AND ALGORITHMS ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER NOV/DEC 2009, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER EE2204 DATA STRUCTURES AND ALGORITHMS  NOV/DEC 2009, IMPORTANT QUESTIONS, 2 MARKS AND 16 MARKS QUESTIONS FOR EEE DEPARTMENT

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2009

Third Semester

Electrical and Electronics Engineering

EE 2204 — DATA STRUCTURES AND ALGORITHMS

(Regulation 2008)

(Common to Instrumentation and Control Engineering and Electronics and

Instrumentation Engineering)

Time : Three hours Maximum : 100 Marks

Answer ALL Questions

PART A — (10 × 2 = 20 Marks)

1. Define Abstract Data Type.
2. Convert the infix expression F) (D/E B/C) (A − ∗ − into a postfix.
3. What are the steps to convert a general tree into a binary tree?
4. List the applications of trees.
5. What do you mean by a heap?
6. Define hashing.
7. What is topological sort?
8. Define biconnected graph.
9. State the greedy algorithm.
10. Mention any two decision problems which are NP-Complete.

PART B — (5 × 16 = 80 Marks)

11. (a) Explain the following operations in a doubly linked list.
(i) Insert an element (6)
(ii) Delete an element (5)
(iii) Reverse the list. (5)
Or
(b) (i) Discuss the algorithms for push and pop operations on a stack. (8)
(ii) Write an algorithm to insert and delete a key in a circular queue. (8)
12. (a) (i) Construct all possible tree structure with 4 nodes. (8)
(ii) Perform preorder, inorder and postorder traversals of the given
tree. (8)
Or
(b) Explain the following operations on a binary search tree with suitable
algorithms.
(i) Find a node (5)
(ii) Insert a node (5)
(iii) Delete a node. (6)
13. (a) (i) Discuss how to insert an element in an AVL tree. Explain with
algorithm. (10)
(ii) What is B-Tree? Explain its properties. (6)
Or
(b) (i) Describe the different hashing functions with an example. (8)
(ii) Explain the common collision resolution strategies in open
addressing hashing. (8)
14. (a) (i) Explain the breadth first search algorithm. (8)
(ii) Write and explain the Prim’s algorithm with an example. (8)
Or
(b) (i) What is a strongly connected graph? Give an example. (4)
(ii) Write the algorithm to compute lengths of shortest path. (4)
(iii) Explain the depth first search algorithm. (8)
15. (a) Find the optimal tour in the following traveling salesperson problem
using dynamic programming. (16)
Or
(b) (i) Explain the method of solving N queens problem by back tracking.
(10)
(ii) Discuss briefly the various asymptotic notations used in algorithm
analysis. (6)