EE2201 MEASUREMENTS AND INSTRUMENTATION ANNA UNIVERSITY QUESTION PAPER NOV/DEC 2009 FOR EEE DEPARTMENT ...

EE2201 MEASUREMENTS AND INSTRUMENTATION ANNA UNIVERSITY QUESTION PAPER NOV/DEC 2009 FOR EEE DEPARTMENT ...

Posted by R.Anirudhan

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

Third Semester

Electrical and Electronics Engineering

EE2201 — MEASUREMENTS AND INSTRUMENTATION

(Regulation 2008)

Time : Three hours Maximum : 100 Marks

Answer ALL Questions

PART A — (10 × 2 = 20 Marks)

1. Differentiate Resolution from Threshold.

2. How are the absolute and relative errors expressed mathematically?

3. What are the essential torques required for operating an instrument?

4. What is phase meter? Mention the types of phase meter.

5. What is an isolation amplifier? Where is it used?

6. State the condition for balance in a Wheatstone bridge.

7. What are the types of printers according to printing methodology?

8. What are the main parts of the cathode ray tube?

9. Differentiate sensor from transducer.

10. Draw the block diagram for 4 bit Analog to Digital Converter.

PART B — (5 × 16 = 80 Marks)

11. (a) Define and explain the static characteristics of an instrument.

Or

(b) (i) Draw and explain the general block diagram of measurement

system.

(ii) Write a note on different types of errors.

12. (a) Describe the construction and working principle of single phase

induction type energy meter. Write a short note on any two adjustments

required in energy meters.

Or

(b) Explain with neat sketch the classification of Instrument Transformers.

Write a note on the errors affecting the characteristics of an Instrument

Transformer.

13. (a) With a neat sketch describe a bridge to determine the unknown

inductance and a bridge to determine the unknown capacitance.

Or

(b) Explain the grounding techniques in detail to reduce the ground loop

interference signal.

14. (a) Describe the LED and LCD display devices.

Or

(b) Describe the direct and frequency modulation magnetic tape recording

types. Give its merits and demerits.

15. (a) What are the selection criteria for the transducer? Explain the working

principle of LVDT with neat sketch and characteristics. Give

advantages, disadvantages and applications of LVDT.

Or

(b) What are the performance parameters of Analog to Digital Converter?

Explain any two basic A/D conversion techniques in detail.

EC2203 - DIGITAL ELECTRONICS ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER NOV/DEC 2009 FOR ECE DEPARTMENT ...

EC2203 - DIGITAL ELECTRONICS ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER NOV/DEC 2009 FOR ECE DEPARTMENT ...

Posted by R.Anirudhan

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

Third Semester

Electronics and Communication Engineering

EC 2203 — DIGITAL ELECTRONICS

(Regulation 2008)

Time : Three hours Maximum : 100 Marks

Answer ALL Questions

PART A — (10 × 2 = 20 Marks)

1. Prove that the logical sum of all minterms of a Boolean function of 2 variables is 1.

2. Show that a positive logic NAND gate is a negative logic NOR gate.

3. Suggest a solution to overcome the limitation on the speed of an adder.

4. Differentiate a decoder from a demultiplexer.

5. Write down the characteristic equation for JK flipflop.

6. Distinguish between synchronous and asynchronous sequential circuits.

7. Compare and contrast static RAM and dynamic RAM.

8. What is PAL? How does it differ from PLA?

9. What are Hazards?

10. Compare the ASM chart with a conventional flow chart.

PART B — (5 × 16 = 80 Marks)

11. (a) (i) Express the Boolean function Z X XY F + = in product of Maxterm.

(6)

(ii) Reduce the following function using K-map technique

( ) ( ) ( ) 6 , 2 14 , 12 , 10 , 8 , 7 , 4 , 3 , 0 , , , d D C B A f + = π . (10)

Or

(b) Simplify the following Boolean function by using Quine-Mcclusky method

( ) ( ) ∑ = 13 , 12 , 10 , 8 , 7 , 6 , 3 , 2 , 0 , , , D C B A F . (16)

12. (a) Design a carry look ahead adder with necessary diagrams. (16)

Or

(b) (i) Implement full subtractor using demultiplexer. (10)

(ii) Implement the given Boolean function using 8 : 1 multiplexer

( ) ( ) ∑ = 6 , 5 , 3 , 1 , , C B A F . (6)

13. (a) (i) How will you convert a D flipflop into JK flipflop? (8)

(ii) Explain the operation of a JK master slave flipflop. (8)

Or

(b) Explain in detail the operation of a 4 bit binary ripple counter. (16)

14. (a) Implement the following Boolean functions with a PLA

( ) ( ) ∑ = 4 , 2 , 1 , 0 , , 1 C B A F

( ) ( ) ∑ = 7 , 6 , 5 , 0 , , 2 C B A F

( ) ( ) ∑ = 7 , 5 , 3 , 0 , , 3 C B A F . (16)

Or

(b) Design a combinational circuit using a ROM. The circuit accepts a three

bit number and outputs a binary number equal to the square of the input

number. (16)

15. (a) Design a three bit binary counter using T flipflops. (16)

Or

(b) Design a negative-edge triggered ‘T flipflop’. (16)

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PH2111 Engineering Physics I previous year Anna University question paper nov/dec 2010 for first year common for all first years ...

PH2111 Engineering Physics I previous year Anna University question paper nov/dec 2010 for first year common for all first years ...

Posted by R.Anirudhan

B.E./B.Tech.Degree Examinations, November/December 2010

Regulations 2008

First Semester

Common to all branches

PH2111 Engineering Physics I

Time: Three Hours Maximum: 100 Marks

Answer ALL Questions

Part A - (10 x 2 = 20 Marks)

1. List down the disadvantages of piezoelectric e®ect.

2. Compare transmission and re°ection modes of non destructive testing using ultra-

sonics.

3. Why is population inversion necessary to achieve lasing?

4. How is electrons and holes con¯nement made in the active region of heterojunction

laser?

5. What are the di®erent types of classi¯cation of optical ¯bres?

6. Explain dispersion in an optical ¯ber.

7. De¯ne blackbody and blackbody radiation.

8. What i s meant by wave function?

9. An element has a HCP structure. If the radius of the atom is 1.605ºA, ¯nd the height

of unit cell.

10. What i s meant by a `Schottky pair'?

Part B - (5 x 16 = 80 Marks)

11. (a) With a neat diagram explain the method of production of ultrasound using

piezoelectric crystal. (16)

OR

11. (b) (i) With a neat diagram, discuss the principle and inspection method of ul-

trasonic °aw detector. (12)

(ii) Calculate the velocity of ultrasonic waves in water using acoustic grat-

ing. The frequency of the ultrasonic wave generated by transducer is 2

MHz. The di®raction angle measured i s 8'45" in the third order di®rac-

tion pattern. Wavelength of laser light used in this experiment is 6328ºA.

(4)

12. (a) Discuss the Einstein's theory of stimulated absorption, spontaneous and stim-

ulated emission of radiation. What are the conditions for light ampli¯cation?

(16)

OR

12. (b) (i) What is hologram? What are the necessary steps involved in recording

and reconstruction of a hologram? (12)

(ii) Compare holography with photography. (4)

13. (a) (i) Explain the basic structure of an optical ¯bre and discuss the principle of

transmission of light through optical ¯bres. (5)

(ii) Derive an expression for numerical aperture. (5)

(iii) Brie°y discuss a technique of optical ¯bre drawing. (6)

OR

13. (b) Explain the concept of optical ¯ber sensors and describe in detail about any

two sensors. (6 + 10)

14. (a) (i) What is meant by matter wave? (2)

(ii) Derive an expression for the wavelength of matter wave. (8)

(iii) Describe an experiment that veri¯es the existance of matter waves. (6)

OR

14. (b) Solve Schrodinger's wave equation for a particle in a box (one dimensional)

and obtain the energy and eigen function. (16)

15. (a) (i) De¯ne atomic packing factor. (2)




(ii) Calculate the number of atoms, atomic radius, coordination number and

atomic packing fraction for BCC and FCC structures. (10)

(iii) The distance between successive planes of Miller indices (111) i s 2.078ºA

for a metal having FCC structure. Find the atomic radius and volume of

its unit cell. (4)

OR

15. (b) (i) De¯ne the terms polymorphism and allotropy. (2)

(ii) Explain in detail the crystal defects and their types. (14)

Engineering Physics I previous year PH2111 anna university question paper MAY/JUNE 2010 for first year common for all branches ...

Engineering Physics I previous year PH2111 anna university question paper MAY/JUNE 2010 for first year common for all branches ...

Posted by R.Anirudhan

B.E./B.Tech. DEGREE EXAMINATIONS, MAY/JUNE 2010

Regulations 2008

First Semester

Common to all branches

PH2111 Engineering Physics I

Time: Three Hours Maximum: 100 Marks

Answer ALL Questions

Part A - (10 x 2 = 20 Marks)

1. Mention any two properties of ultrasonic waves.

2. What i s the principle of pulse echo system?

3. What are the conditions needed for laser action?

4. What is holography?.

5. De¯ne acceptance angle of a ¯bre.

6. Give the applications of the ¯bre optical system.

7. Calculate de Broglie wavelength of an electron moving with velocity 107 m/s.

8. Explain degenerate and non-degenerate states.

9. Calculate the ¯rst and second nearest neighbor distances in the body centered cubic unit

cell of sodium, which has lattice constant of 4:3 £ 10¡10 m.

10. What is meant by Frenkel imperfection?

Part B - (5 x 16 = 80 Marks)

11. (a) (i) What are magnetostriction and piezoelectric e®ect? (4)

(ii) Write down the complete experimental procedure with a neat circuit diagram of

producing ultrasonic waves by piezoelectric e®ect. (12)

OR

11. (b) (i) What is an acoustic grating? How is it used in determining the velocity of

ultrasound?

(2 + 6)

(ii) Explain the process of non-destructive testing of materials using ultrasonic waves

by pulse-echo method. (8)

12. (a) (i) Derive the relation between the probabilities of spontaneous emission and stimu-

lated emission in terms of Einstein's coe±cients. (8)

(ii) Explain the following pumping mechanisms.

(1) optical and

(2) electric discharge. (8)

OR

12. (b) (i) With a neat sketch, explain the construction, principle and working of CO2 laser.

(14)

(ii) Mention four applications of lasers in materials processing.

(2)

13. (a) (i) Explain the basic structure of an optical ¯bre and discuss the principle of trans-

mission of light through optical ¯bres. (5)

(ii) Derive an expression for numerical aperture. (5)

(iii) Brie°y discuss a technique of optical ¯bre drawing. (6)

OR

13. (b) (i) With a neat diagram, give an account on displacement sensors. (8)

(ii) Give an elaborate account on losses in optical ¯bres. (8)

14. (a) (i) What is Compton e®ect? Derive an expression for the change in wavelength

su®ered by an X-ray photon, when it collides with an electron. (2 + 12)

(ii) An electron at rest is accelerated through a potential of 2 kV. Calculate the de

Broglie wavelength of matter wave associated with it. (2)

OR

14. (b) (i) Solve the Schrodinger's wave equation for a free particle of mass m moving within

a one dimensional potential box of width L to obtain eigenvalues of energy and

eigenfunctions.

(11)

(ii) Find the eigenvalues of energies and eigenfunctions of an electron moving in a

one dimensional potential box of in¯nite height and 1 ºA of width. Given that m

= 9.11 £10¡31 kg and h = 6.63 £10¡34 J. (5)

15. (a) (i) What are Miller indices? Mention the steps involved to determine the Miller

indices with example. (2 + 4)

(ii) The material zinc has HCP structure. If the radius of the atom is

1

4

th of the

diagonal of hexagon, calculate the height of the unit cell in terms of atomic

radius.

(2)

(iii) Show that the packing factor for HCP i s 74% . (8)

OR

15. (b) (i) What i s Burger vector? (2)

(ii) Draw Burger circuit indicating Burger vector for edge dislocation and screw dis-

location. (4+4)

(iii) Certain defects in crystals improve the properties of crystals. Explain. (6)

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