question paper code : a3304 (autonomous) b. tech ii … · 2018-12-10 · answer one question from...

Hall Ticket No: Question Paper Code : A3304

(AUTONOMOUS)

B. Tech II Semester Regular/Supplementary Examinations, May - 2017 (Regulations: VCE-R15)

ENGINEERING DRAWING-II (Common to Mechanical Engineering & Civil Engineering)

Date: 27 May, 2017 FN Time: 3 hours Max Marks: 75

Answer ONE question from each Unit

All Questions Carry Equal Marks

Unit – I

1. A square pyramid, base 25mm side and axis 40mm long, has its base on the ground and all the edges of the base equally inclined to the V.P. It is cut by a section plane, perpendicular to the V.P., inclined at 300 to the H.P. and passing through a point on the axis at 21mm from the base. Draw the sectional top view and the true shape of the section.

15M

2. Draw the development of lateral surface of the truncated cylinder which is cut by a section plane perpendicular to V.P. and inclined to H.P. at an angle 450 and passing through the top visible edge. Cylinder has the diameter 40mm and height 55mm resting on its base on HP.

15M

Unit – II

3. A horizontal cylinder of diameter 40mm penetrates into a vertical cylinder of diameter 60mm. The axes of the cylinders intersect at right angles. Draw the curves of intersection when the axis of the horizontal cylinder is parallel to the V.P.

15M

4. A vertical cylinder of diameter 120mm is fully penetrated by a cylinder of diameter 90mm, their axes intersecting each other. The axis of the penetrating cylinder is inclined at 30degree to the HP and is parallel to the V.P. Draw the top and front views of the cylinders and the curves of intersection.

15M

Unit – III

5. A cylindrical slab of 75mm diameter, 50mm thick is surmounted by a cube of 40mm side. On the top of cube rests a pentagonal pyramid of 40mm height and base width 25mm. The axes of all the solids are in same line. Draw the isometric projection of the combination of solids.

15M

6. Draw the isometric projection of the combination of solids formed by a frustum of cone and co-axial frustum of pentagonal pyramid. The lower frustum of cone is of 80mm base diameter, 60mm top diameter and height 25mm. The upper frustum of pyramid is of 30mm side of base, 20mm side of top face and height 40mm.

15M

Unit – IV

7. Draw the front view, left side view and top view of the following object shown in Fig.1. (All dimensions are in mm).

Fig.1

15M

Cont…2

:: 2 ::

8. Draw the front view, top view and left side view of the following object shown in Fig.2. (All

dimensions are in mm).

Fig.2

15M

Unit – V

9. Draw the perspective view of a circle of 50mm diameter, lying on the ground plane and touching the picture plane. The station point is 80mm in front of the picture plane and 60mm above the ground plane. The central plane passes through the center of the circle.

15M

10. A square prism of 30mm side of base and height 50mm rests with its base on ground such that one of the rectangular faces is touching the picture plane. The station point lies on the central line of the object, 60mm above the ground and 50mm in front of the picture plane. Draw the perspective view of the square prism.

15M


(AUTONOMOUS)

B. Tech II Semester Regular/Supplementary Examinations, May - 2017 (Regulations: VCE-R15)

MATHEMATICS-II (Common for All Branches)

Date: 30 May, 2017 FN Time: 3 hours Max Marks: 75



Unit – I

1.

a) Express the matrix

1 7 1

2 3 4

5 0 5

as a sum of symmetric and skew symmetric matrices.

7M

b) Test the consistency and solve

2 2 24 7, 2 4 2, 3 2 4 3, 24 0x y z x y x y z x

8M

2.

a) Verify Cayley-Hamilton theorem for the matrix

1 2 3

2 4 5

3 5 6

A

and hence find the

inverse of A and also find 4A

8M

b) Find the rank of the matrix

1 3 1 2

0 11 5 3

2 5 3 1

4 1 1 5

A

by reducing to Echolon Form.

7M

Unit – II

3. a) Verify whether the Eigen vectors of the matrix A are orthogonal

where

322

121

101

A

7M

b) Reduce the quadratic form 31

2

3

2

2

2

1 2222 xxxxx to canonical form by orthogonal

transformation and hence find the associated orthogonal linear transformation.

8M

4. a) Find the inverse transformation of the following linear transformation.

323

3212

3211

2

1142

52

xxy

xxxy

xxxy

7M

b) Find a matrix P which diagonalizes the matrix

32

14A . Verify that DAPP 1

where

D is the diagonal matrix.

8M

Cont…2

:: 2 ::

Unit – III

5.

a) Solve 2 2 2 2p z q p q

7M

b) Solve 2 2 2 2x y yz p x y zx q z x y

8M

6. a) Form a partial differential equation by eliminating arbitrary functions from

z x y y x

7M

b) Using the method of separation of variables, solve 3 2 0, ,0 4 x

x yu u u x e

8M

Unit – IV

7.

a) Obtain the Fourier series for the function ,f x x x

8M

b) Find the Fourier series expansion of 2 2, 2 2f x x x

7M

8.

a) Obtain the Fourier series for 2 ,f x x x x

8M

b) Find the half-range Fourier sine series for f x x x in 0 x

and hence deduce that 3

3 3 3 3

1 1 1 1.......

1 3 5 7 32

7M

Unit – V

9.

a) Find the Fourier Transform of ,

,0,

a x x af x

x a

hence show that

2

20

sin

2

x

x

8M

b) Prove that ,n n

dZ nu z Z u

dz hence find

1

nZ

n

given

1log

1 1

zZ z

n z

7M

10.

a) Given 2

3 2

4 2

5 8 4

z zu z

z z z

find nu

7M

b) Solve the difference equation 2 1 0 12 , 0n n ny y y n y y

8M


(AUTONOMOUS)

B. Tech II Semester Regular/Supplementary Examinations, May/June - 2017 (Regulations: VCE-R15)

ENGINEERING PHYSICS (Common to Computer Science and Engineering, Information Technology &

Electrical and Electronics Engineering) Date: 01 June, 2017 FN Time: 3 hours Max Marks: 75



Unit – I

1. a) What are Miller indices of a plane? Write the steps followed to specify the crystal planes using Miller indices with an example. Draw (010) and (123) planes in a cubic unit cell.

8M

b) Ni has FCC structure with lattice constant 3.52 Å. Calculate the inter-planar spacing for: i. (101) planes ii. (123) planes iii. (320) planes

7M

2. a) Derive Bragg’s law. Explain powder diffraction method. 8M b) First order Bragg refection is observed in a certain cubic crystal of lattice constant 3.14Å

with X-rays of wavelength 1.54 Å for a glancing angle of 20.30. Determine the inter-planar spacing and the miller indices of the possible planes which may be involved in the reflection.

7M

Unit – II

3. a) Describe Davisson and Germer’s experiment for confirmation of Debroglie’s hypothesis with neat sketch.

8M

b) State the Debroglie’s hypothesis and derive the expression for Debroglie’s wavelength. Find the kinetic energy and velocity of an electron with Debroglie’s wavelength of 0.2nm.

7M

4. a) Describe with suitable diagrams the construction and working of a P-N junction diode. 8M b) What is Fermi level? Explain the application of semiconductor in light emitting diode with

figure. 7M

Unit – III

5. a) Explain the Sol-gel method to synthesize nanomaterials. 8M b) Calculate the increase in surface area to volume ratio if a cube of length 1m is cut into 27

small pieces. Also find the surface area to volume ratio of a sphere of radius 5m.

7M

6. a) Discuss about Piezoelectrics and Ferroelectrics. 8M b) The electronic polarizability of Ne gas is 0.35X10-40Fm2. If the gas contains

2.7X1025atoms/m3 at 00c and 1 atmospheric pressure. Calculate its dielectric constant. 7M

Unit – IV

7. a) Discuss the properties of soft and hard magnetic materials with the help of hysteresis loop.

8M

b) Explain Weiss theory of ferromagnetism. A silicon material is subjected to a magnetic field of strength 1000A/m. If the magnetic susceptibility of silicon is -0.3x10-5, calculate its magnetization. Also evaluate the magnetic flux density of the field inside the material.

7M

Cont…2

::2::

8. a) Write any four differences between Type-I and Type-II superconductors. And give any eight applications of superconductors.

8M

b) Determine the transition temperature and critical field at 4.2K for a superconductor if the critical fields are 1.41 x 105 and 4.205 x 105amp/m at 1.41 K and 12.9K respectively.

7M

Unit – V

9. a) Describe the construction of He-Ne laser and explain its working with the help of energy level diagram.

8M

b) Discuss the conditions for Laser action. Find the ratio of population of two energy levels in a Laser if the transition between them produces light of wavelength 694.3nm. Assume the ambient temperature to the 27oC.

7M

10. a) Explain the point to point Optical Fiber communication system with a neat block diagram.

8M

b) Define the terms: i. Refractive index profile of step index Optical Fiber ii. Fractional index change iii. Angle of acceptance iv. Attenuation coefficient The refractive indices of core and cladding are 1.5 and 1.48 respectively in an optical fiber. Find the numerical aperture and angle of acceptance.

7M


(AUTONOMOUS)

B. Tech II Semester Regular Examinations, May/June - 2017 (Regulations: VCE-R15)

TECHNICAL ENGLISH (Common to Electronics and Communication Engineering,

Mechanical Engineering & Civil Engineering) Date: 1 June, 2017 FN Time: 3 hours Max Marks: 75



Unit – I

1. a) Discuss the adverse impact of tourism on Ladakh. 10M

b) Do as directed: i. Write the antonym for the word: pristine ii. Write the synonym for the word: chic iii. Choose the appropriate article: Preparing traditional Ladakhi food is not easy

because _______ingredients are expensive. (an, the) iv. Choose the appropriate word: To prove his point, he ________ an example. (cited,

sited) v. Write the prefix: discrimination

5M

2. a) The UN General-Secretary’s statement about Mother Teresa - “She is the United Nations. She is world Peace.” Justify this statement by citing the various service activities she undertook.

10M

b) Do as directed: i. Write the meaning for the idiom: a feather in the cap ii. Use the appropriate article: We use ________pronoun instead of repeating a proper

noun. iii. Use the phrasal verb in your own sentence: get on with iv. Write the antonym for the word: care v. Correct the sentence: I am twenty years.

5M

Unit – II

3. a) Comment on the title “The Connoisseur”. 10M

b) Do as directed: i. Use a prefix to form the antonym: own ii. Write the synonym for the word: amicable iii. Choose the appropriate word: They have a …… near the airport. (cite/sight/site) iv. Use correct preposition: What is the time ….. your watch? v. Write the meaning of the idiom: an apple of one’s eye

5M

4. a) Elaborate Sam Pitroda’s contribution to Indian Telecom. 10M

b) Match the idioms with their meanings: i. To blow one’s own trumpet i. To reveal a secret ii. In black and white ii. To go waste iii. End in smoke iii. Of ease and comfort iv. Spill the beans iv. To praise oneself v. Bed of roses v. In writing

5M

Cont…2

:: 2 ::

Unit – III

5. a) How does Satyajit Ray justify his observation that film making in India is a tough business?

10M

b) Do as directed: i. Rewrite the sentence in right order: I never have seen anywhere such an amicable

man. ii. Identify the modal verb: One must work for the development of the country. iii. Use the idiom in your own sentence: scot free iv. Give one word substitute: a person who cultivates a refined taste, especially in food

and fine arts v. Derive the verb form of the word: friend

5M

6. a) Martin Luther King Jr. is best known for his role in the advancement of civil rights. Discuss.

10M

b) Do as directed: i. Write the antonym for the word: brutality ii. Write the synonym for the word: prosperity iii. Use the idiom in your own sentence: a wild goose chase iv. Give one word substitute: the action of saving or being saved from sin, error or evil v. Correct the sentence: I have writing the exam for two hours.

5M

Unit – IV

7. a) How was the distribution of clothes and medicines that poured in for the tsunami victims handled?

8M

b) Write a letter to an educational institute enquiring the short term courses they offer. State your area of interest.

7M

8. a) Draft a job application letter and a resume for the post of software design engineer. 8M

b) Fill in the blanks with appropriate tense forms of the verbs given in the brackets: Roshan ……. (live) in Bangalore. He …….. (work) as a software engineer. He …….. (have) two children, who …… (go) to school. Roshan’s wife …….. (be) a fashion designer. His younger son ….. (like) painting. They ….. (plan) to go on a Europe trip in the summer holidays.

7M

Unit – V

9. a) What are the solutions offered by Obama for the problems of today? 8M

b) Prepare a report to be submitted to the Municipal Commissioner of your town on the necessity of widening of roads to ease traffic problems.

7M

10. a) What according to Obama is the contribution of Islam to the civilization of the world? 8M

b) Imagine that you are the Student Coordinator of your College Technical Forum. Prepare a report to be submitted to the Principal about the Student Research Paper Presentation contest conduction in your college.

7M


(AUTONOMOUS)


ENGINEERING CHEMISTRY (Common to Computer Science and Engineering, Information Technology &

Electrical and Electronics Engineering) Date: 03 June, 2017 FN Time: 3 hours Max Marks: 75



Unit – I

1. a) What is a galvanic cell? Explain the construction and working of Daniel cell. 9M b) A conductivity cell is filled with 0.05N NaCl solution. The distance between two

electrodes is 10.5cm and the area of the electrode plate is 1.25cm2. The resistance of the solution was found to be 2X103Ω. Calculate the cell constant and specific conductance.

6M

2. a) Describe the construction and working of Ni-Cd cell. Write the uses of Ni-Cd cell. 8M b) Define EMF of cell. In a galvanic cell, Mg metal dipped in 10 M MgSO4 and Ni metal

dipped in 4 M NiSO4 solutions. Calculate the EMF of the cell at 298K. Given the standard reduction potentials of Mg and Ni are -2.37V and -0.23V respectively.

7M

Unit – II

3. a) Discuss the hardness of water, types of hardness, how it is expressed and units of hardness.

8M

b) Calculate the temporary and permanent hardness of a hard water sample which contains 8.1 mg/l of Ca(HCO3)2, 7.5 mg/l of Mg(HCO3)2, 12.0 mg/l of MgSO4 and 13.6 mg/l of CaSO4 (given that mol. wt. of Ca(HCO3)2 = 162, Mg(HCO3)2 146, MgSO4 = 120 and CaSO4 = 136).

7M

4. a) Distinguish internal and external treatment. Explain the Ion-Exchange process softening of water with regeneration.

8M

b) What do you understand by brackish water? Explain the brackish water treatment by electro dialysis.

7M

Unit – III

5. a) Give the chemical reactions involved in the preparation of Buna–N and Nylon. Write their applications.

8M

b) What are insulators? Describe the characteristics of thermal and electrical insulators.

7M

6. a) What are conducting polymers and how are they classified? Explain how doping enhances the electrical conductivity in polyacetylene.

7M

b) What is cement and give its composition? Describe the process of manufacture of Portland cement with the help of schematic diagram.

8M

Unit – IV

7. a) Describe Fischer Tropsch’s process to produce synthetic petrol. 10M b) A sample of coal was found to contain the following: C=75%; H=5%; O=1%; N=2%,

remaining being ash. Calculate the amount of air required for complete combustion of 1kg of coal sample.

5M

8. a) Explain the determination of carbon and hydrogen in the coal sample. 8M b) Describe with neat diagram the analysis of flue gas by Orsats’s apparatus. What is the

significance of this analysis results? 7M

Cont…2

:: 2 ::

Unit – V

9. a) Discuss in detail the phase diagram of lead-silver system and explain the eutectic point, its characteristics and uses.

8M

b) What are nanomaterials? Explain the preparation of nanomaterials by any one synthetic method.

7M

10. a) Compare top-down and bottom-up approaches for the synthesis of nanoparticles. Mention four general applications of nanomaterials.

7M

b) What are the merits and limitations of phase rule? Determine the number of components in the following equilibria: i. 2KClO3 (s) ↔ 2KCl(s) + 3 O2(g)

ii. NH4Cl(s)↔ NH3 (g) + HCl(g)

8M

Hall Ticket No: Question Paper Code: A3004

(AUTONOMOUS) B. Tech II Semester Regular/Supplementary Examinations, May/June - 2017

(Regulations: VCE-R15)

PROBABILITY THEORY AND NUMERICAL METHODS

(Common to Electronics and Communication Engineering, Mechanical Engineering & Civil Engineering)

Date: 3 June, 2017 FN Time: 3 hours Max Marks: 75

Answer ONE question from each Unit All Questions Carry Equal Marks

Unit – I

1. a) The probability of three students to solve a problem in mathematics are 1/2, 1/3, 1/4 respectively, find the probability that the problem to be solved.

7M

b) In a bolt factory machines A, B, C manufacture 20%, 30% and 50% of the total of their output, 6%, 3% and 2% are defective. A bolt is drawn at random and found to be defective. Find the probabilities that it is manufactured from: i. Machine A ii. Machine B iii. Machine C

8M

2. a) From a city 3 news papers A, B, C are being published. A is read by 20%, B is read by 16%, C is read by 14%, both A and B are read by 8%, both A and C are read by 5%, both B and C are read by 4% and all three A, B, C are read by 2%. What is the percentage of the population that read at least one paper?

7M

b) A and B throw alternately with a pair of ordinary dice. A wins if he throws 6 before B throws 7 and B wins if he throws 7 before A throws 6.If A begins, show that his chance of winning is 30/61.

8M

Unit – II

3. a) For the continuous random variable X whose probability density function is given by:

2 , 0 2

0 ,

cx x if xf x

otherwise

where c is a constant. Find:

i. c ii. Mean iii. Variance

8M

b) 2% of the items of a factory are defective. The items are packed in boxes. What is the probability that there will be: i. 2 defective items in a box of 100 items ii. At least three defective items in a box of 100 items

7M

4. a) Suppose the weights of 800 male students are normally distributed with mean 140

pounds and standard deviation 10pounds. Find the number of students whose weights are: i. Between 138 and 148 pounds ii. More than 152 pounds

8M

b) The mean and variance of a binomial distribution are 4 and 4/3 respectively. Find

1P x

7M

Cont…2

::2::

Unit – III

5. a) Find a real root of 3 5 3 0x x using bisection method. 7M

b) Using Lagrange’s formula, find 3f from the following table:

x 0 1 2 4

f x 1 14 15 5

8M

6. a) Find a real root of 10log 1.2x x using Regula-falsi method. 7M

b) Given 0sin 45 0.7071, 0sin50 0.7660, 0sin55 0.8192 and 0sin60 0.8660.

Find 0sin52 , using Newton’s forward interpolation formula.

8M

Unit – IV

7.

a) Find the value of

1

0 21 x

dx correct to four decimal places taking five intervals by

Trapezoidal’s rule.

7M

b) Fit a second degree polynomial to the following data by the method of least squares:

x 10 12 15 23 20 y 14 17 23 25 21

8M

8. a) Fit a straight line to the form y a bx for the following data:

x 1 2 3 4 5 y 14 27 40 55 68

7M

b) Find the value of dxe x

6.0

0 taking n=6 correct to four decimal places by Simpson’s 1/3

rule.

8M

Unit – V

9.

a) Tabulate 0.1y and 0.2y using Taylor’s series method given that 2yxdx

dy and

0 1.y

7M

b) Given 2 2dyx x y

dx and 1 1, 1.1 1.233, 1.2 1.5484, 1.3 1.9789.y y y y

Evaluate 1.4y by Adams-Bashforth method.

8M

10.

a) Solve by Euler’s method dy

x ydx

, 0 1y and find 0.4y taking step size

0.1.h

7M

b) Compute 0.1y and 0.2y by Runge-Kutta fourth order method for the equation

2yxydx

dy , 0 1.y

8M




ELECTRONIC DEVICES AND CIRCUITS

(Common to Computer Science and Engineering, Information Technology, Electronics and Communication Engineering & Electrical and Electronics Engineering)



Unit – I

1. a) Consider a simple diode circuit and explain VI characteristics of PN junction. 8M b) An AC voltage of peak value 20V is connected in series with a silicon diode and

resistance of 500Ω. If the forward resistance of the diode is 10Ω. Find: i. Peak current through the diode ii. Peak output voltage. iii. What will be these values if the diode is assumed to be ideal

7M

2. a) Describe transition and diffusion capacitance of a silicon diode. 7M b) A germanium diode displays a forward voltage of 0.25V at 10mA current at room

temperature (300K). Estimate the reverse saturation current IS. Assume diode ideality factor to be 1. Calculate the bias voltage needed for diode currents of 1mA and 100mA. Comment on the result. Estimate the value of IS and also forward current at 0.25V, at 30oC above room temperature.

8M

Unit – II

3. a) Differentiate Zener breakdown and Avalanche breakdown mechanisms. 6M b) The secondary voltages of a center tapped transformer are given as 12V-0V-12V. The

total resistance of secondary coil and forward diode resistance of each section of transformer secondary is 100Ω. Compute the following for a load resistance of 900Ω. i. Average load current ii. Rectification efficiency iii. Ripple factor

9M

4. a) Explain the principle of operation of a Varactor diode. Mention its applications. 7M b) What is necessity of a filter? Derive the ripple factor of a full-wave rectifier with

capacitor filter.

8M

Unit – III

5. a) Explain the input and output characteristics of common base BJT circuit. 8M b) Fig.1 shows a transistor circuit with an open base lead. If VCE is found to be 9V, what

would be the values of ICEO? If we change collector resistance Rc from 10MΩ to 10kΩ. What will be the value of VCE?

Fig.1

7M

Cont…2

:: 2 ::

6. a) Explain the construction of depletion type MOSFET with diagram and VI characteristics. 8M b) The following readings were obtained experimentally from a FET.

VGS 0V 0V 0.2V

VDS 7V 15 V 15V

ID 10 mA 10.25mA 9.65mA

Determine: i. AC drain resistance ii. Transconductance iii. Amplification factor

7M

Unit – IV

7. a) What is the necessity of biasing? List types of biasing techniques. 5M b) Design a self-bias circuit to meet the following specifications. VCC = 12 V, RC = 4.7KΩ,

IC = 1mA, and S = 5. Assume β = 50.

10M

8. a) What is thermal runaway? Derive condition to avoid it. 7M b) Design a fixed bias circuit using BJT to operate at VCE = 3 V and IC = 1.5mA when β = 150.

What would be the new operating point if the transistor is replaced by another with β = 200?

8M

Unit – V

9. a) Draw the circuit diagram of CE fixed bias configuration. Draw its approximate h parameter model. Derive the expressions for AI, RI and AV.

8M

b) For the network shown below in Fig.2 determine ZI, ZO, AV, AI Given hfb=-0.99, hib=14.3Ω, hob=0.5µA/V.

Fig.2

7M

10. a) Draw the circuit diagram of JFET common gate configuration and give expression for ZI, ZO, AV using small signal model.

8M

b) For the network shown below in Fig.3, VGSQ=-2.86V and IDQ=4.56mA. Determine: i. gm ii. rd iii. ZI Given IDSS =16mA, Vp=-4V, YOS=25 S.

Fig.3

7M


(AUTONOMOUS)


BASIC ELECTRONICS (Mechanical Engineering)




Unit – I

1. a) With neat diagrams, explain the VI characteristics of a PN junction diode in forward bias and reverse bias conditions.

7M

b) A half wave rectifier with capacitor filter is supplying a resistive load of 500Ω. It is supplied from a 230V, 50Hz AC mains. The load ripple content should not exceed 2%. Determine: i. Filter capacitor ii. DC load voltage iii. DC load current iv. Peak diode current

8M

2. a) With neat diagrams, explain the role of a Zener diode in voltage regulation. 7M b) A full wave rectifier using two silicon diodes and a centre-tapped transformer is supplying

a resistive load of 2kΩ. The AC supply voltage is 220V (rms) and the turns ratio of the transformer is 10:1. Calculate: i. DC output voltage ii. DC load current iii. DC diode current iv. Peak diode current

8M

Unit – II

3. a) With neat diagram, explain the working of BJT in CE configuration. 7M b) For the fixed bias circuit, RB=50kΩ, RC=500Ω, VCC=10V. Find the coordinates of the

operating point. Draw the dc load line and locate the operating point on the dc load line. Assume silicon transistor with β=50. Find the new operating point if the transistor is replaced by a similar transistor with β=100. Comment on the stability of the circuit.

8M

4. a) With neat diagram, explain the working of BJT in CC configuration. 7M b) For a self-bias circuit that uses silicon transistor with β=100, RB=510kΩ, RC=2.4kΩ,

RE=1.5kΩ, VCC=20V, determine: i. S (ICO) ii. S (VBE) iii. S (β) with β (T1) = 100 and β (T2) is 25 % more than β (T1) iv. Net change in IC if ICO increases from 0.2 to 10 µ A, VBE drops from 0.7 V to 0.5 V and

β increases by 25 %

8M

Unit – III

5. a) With neat diagram, analyze the h-parameter model of BJT in CB configuration. 7M b) For a CE amplifier with voltage divider bias, R1 = 68kΩ, R2 = 12kΩ, RC = 2.2kΩ, RE = 1.2kΩ,

VCC = 18V, hfe = 180, hie = 2.75kΩ and hoe = 25µS. Determine: i. Zi and Zo ii. AV and AI iii. re and compare β re with hie

8M

6. a) Compare the CB, CC and CE configuration with respect to various parameters. 7M b) Obtain CE h-parameters in terms of CC h-parameters. 8M

Cont…2

:: 2 ::

Unit – IV

7. a) Draw the block diagram of feedback network for an amplifier and explain each block in detail.

7M

b) An amplifier without feedback gives a fundamental output of 36V with 7% second harmonic distortion when input is 0.028V. If 1.2% of output is feedback into input in a negative series feedback circuit, what is output voltage? If fundamental output is maintained at 36V, but the second harmonic distortion is reduced to 1%, what is input voltage?

8M

8. a) Draw the basic block diagram of RF oscillator and derive expressions for gain and frequency of oscillation.

8M

b) A Colpitt’s oscillator is designed with C2=100pF and C1=7500pF. The inductance is variable. Determine the range of inductance values, if the frequency of oscillation is varied between 950Hz and 2050kHz.

7M

Unit – V

9. a) State and prove the following: i. De-morgan’s theorem ii. Consensus theorem

7M

b) Perform the following conversions: i. (124.21)8 = ( ? )10 ii. (365.217)8 = ( ? ) 2 iii. (FACE)16 = ( ? )10 iv. (847.951)10 = ( ? ) 8

8M

10. a) Perform the following operations: i. (ABC.12)16 + (12EF.C)16 ii. (110.101)2 – (100.111)2 using 2’s complement arithmetic

7M

b) Analyze with appropriate truth table the following logic gates: i. 2 input Ex-NOR gate ii. 2 input NAND gate

8M


(AUTONOMOUS)


BASIC ELECTRICAL AND ELECTRONICS ENGINEERING (Civil Engineering)




Unit – I

1. a) Define the following as applied to electric circuits: i. Electric Current ii. Potential Difference iii. Electromotive Force iv. Electric Power

8M

b) For the circuit shown in Fig.1, determine: i. The current supplied by the 100V source ii. The voltage across the 6Ω resistance

Fig. 1

7M

2. a) State and explain Faraday’s laws of electromagnetic induction. 7M b) For the circuit shown in Fig. 2, find the current through the 6Ω resistor, using Kirchhoff’s

laws:

Fig. 2

8M

Unit – II 3. a) Define the following and find their values for a sinusoidal voltage waveform:

i. Form Factor ii. Peak Factor

7M

b) For the circuit shown in Fig.3, determine the: i. Current I ii. Voltages V1 iii. Voltages V2 iv. Total impedance

Fig. 3

8M

Cont…2

::2::

4. a) Demonstrate that the current leads voltage in a series RC circuit, with relevant waveforms and phasor diagram.

8M

b) Three impedances Z1 = (5+j5) Ω, Z2 = (0-j8) Ω and Z3 = (4+j0) Ω are connected in series to an unknown voltage source V. Find the current I and voltage V if the voltage drop across

Z3 is 63.2 18.450 volt.

7M

Unit – III

5. a) In the network of Fig.4, find the current in branch B due to a voltage source of 36V in branch A. Now transfer the voltage source to branch B as shown in Fig.5 and find the current in branch A. Is the reciprocity theorem established?

Fig.4 Fig.5

8M

b) Apply Superposition theorem, to compute the current IAB in the circuit shown in Fig.6:

Fig.6

7M

6. a) Draw the basic structure of a Cathode Ray Tube and mention the main parts in it. 7M b) Discuss any two advantages and disadvantages of Permanent Magnet Moving Coil

(PMMC) and Moving Iron (MI) instruments. 8M

Unit – IV

7. a) Explain with neat diagram and output waveforms, the working of a half wave rectifier. 7M b) Draw and explain the reverse bias characteristics of a PN junction diode. Define static

reverse resistance of a PN junction diode.

8M

8. a) Explain the two types of junction capacitances in a PN junction diode. 8M b) Four diodes in a bridge rectifier circuit have negligible forward resistance and infinite

reverse resistance. The ac supply is 240 Vrms and the load resistance is 48 Ω. Calculate: i. The average load current ii. The efficiency

7M

Unit – V

9. a) Explain the input - output characteristics of a transistor in CE configuration indicating the active, saturation and cutoff regions.

8M

b) Find the collector current (IC ) and emitter current (IE), given that αdc = 0.96 and IB =110µA. Also calculate βdc of the transistor.

7M

10. a) Explain with neat sketch the working of an NPN transistor. 7M b) Explain the input - output characteristics of a transistor in CC configuration indicating the

active, saturation and cutoff regions.

8M




DATA STRUCTURES

(Common to Computer Science and Engineering, Information Technology, Electronics and Communication Engineering & Electrical and Electronics Engineering)



Unit – I

1. a) Write the code snippet for the linear search, demonstrate with an example. 7M b) Consider the below code:

void series(int n) int sum; inti; sum = pow(((n * (n + 1) ) / 2),2); for(i =1;i<=n;i++) if (i != n) printf("%d^3 + ",i); else printf("%d^3 = %d ",i,sum); i. What does this code do ii. Measure the time complexity of the code and the space occupied by the same

8M

2. a) Define Data Structure. List the operations performed on data structures and explain briefly.

7M

b) What is an Algorithm? Explain the different approaches to design an algorithm. Describe the asymptotic notations with example.

8M

Unit – II

3. a) Write an algorithm for Radix sort and analyze its time complexity 9M b) Sort the following elements 5, 2, -1, 4, 5, 3, 7, 9, 0, 1, 3, 2, 5 using quick sort. Explain each

step. 6M

4. a) Write an algorithm for Selection Sort and analyze its time complexity. 9M b) What is in-place sorting algorithm? “Merge sort is the in-place sorting algorithm”. Justify

your answer. 6M

Unit – III

5. a) What are the limitations of linear Queues? Give the modified implementation of linear Queue to overcome the limitations.

10M

b) What is DeQueue (Double ended Queue)? Explain the types of it, clearly demonstrate with proper diagrams.

5M

Cont...2

:: 2 ::

6. a) Given Infix expression: A + (B * C) / D

Assume: A = 2, B = 3, C = 4 and D = 6 i. Convert the given infix expression into postfix expression ii. Evaluate the obtained postfix expression by clearly showing the Input symbol, Stack

contents and Operation.

9M

b) List the applications of stack. Write a C program / Algorithm check whether the given string is a palindrome or not, using the stack.

6M

Unit – IV

7. a) Write a C program to add two polynomials using single linked list. 10M b) Differentiate between using arrays and linked lists for implementation of linear lists.

5M

8. a) Write a C function to delete a node before given node in a doubly linked list. 6M b) Construct a C program to represent Sparse matrix using linked list.

9M

Unit – V

9. a) Show the implementation of DFS algorithm whose stating vertex is ‘a’ and use it to trace the graph shown.

Fig.1

8M

b) Construct a binary search tree for the given data traverse the tree using tree traversal techniques: 49 36 78 24 12 100 65

7M

10. a) Represent the adjacency and adjacency list for the graph shown.

Fig.2

8M

b) Give algorithm or code for the binary tree: i. Counting of leaf nodes ii. Height of the tree

7M


(AUTONOMOUS)


ENGINEERING MECHANICS-II (Common to Mechanical Engineering & Civil Engineering)




Unit – I

1. a) A burglar’s car had a start with an acceleration of 2 m/s2. A police vigilant party came after 10 seconds and continued to chase the burglar’s car with a uniform velocity of 40m/s. Find the time taken, in the police van will overtake the car.

8M

b) A flywheel starts rotating from rest and is given an acceleration of 1rad/s2. Find the angular velocity and speed in r.p.m. after 1.5 minutes. If the flywheel is brought to rest with a uniform angular retardation of 0.5rad/s2, determine the time taken by the flywheel in seconds to come to rest.

7M

2. a) Derive an expression for horizontal range and time of flight by a projectile. 7M b) A projectile is aimed at a mark on the horizontal plane through the point of projection

and falls 12m short when the angle of projection is 150, while it overshoots the mark by 24m when the angle is 450. Find the angle of projection to hit the mark. Assume no air resistance. Take the velocity of projection constant in all cases.

8M

Unit – II

3. a) State and explain D’Alemberts principle. 7M b) A force of 200 N acts on a body having mass of 300 kg for 90 seconds. If the initial

velocity of the body is 20 m/s, determine the final velocity of the body: i. When the force acts in the direction of the motion ii. When the force acts in the opposite direction of the motion

8M

4. a) A block of mass 10kg rests on a rough horizontal plane whose coefficient of friction is 0.20. The block is pushed by a force of 50N for 5 seconds. Determine the total distance travelled by block before coming to rest.

9M

b) A body of mass 15kg falls on the ground from a height of 9.6m. The body penetrates into ground. Find the distance through which the body penetrates into ground. The resistance by ground to penetration is equal to 4960N.

6M

Unit – III

5. a) Discuss the advantages of Work- Energy principle over D’Alemberts principle in kinetics. 6M b) A car of mass 1000kg travelling at 30m/s has its speed reduced to 10m/s by a constant

breaking force over a distance of 75m. Find: i. The cars initial kinetic energy ii. The final kinetic energy iii. The breaking force

9M

Cont…2

:: 2 ::

6. a) State and prove Work–Energy principle. 6M b) In the system of blocks shown in Fig.1, m1=3kg and m2=5kg, determine the velocities of

blocks after the block of mass m2 displaces by 2m. Take coefficient of friction as 0.15.

Fig.1

9M

Unit – IV

7. a) A bullet of mass 125 grams is fired into a block of wood resting on a smooth horizontal table moving with a velocity 3m/s in the direction of firing of the bullet. The mass of the block is 10kg. The bullet gets embedded in the block and moves it forward with a velocity of 9m/s. What is the velocity with which the bullet is fired? What is the loss of KE due to impact?

8M

b) A tennis ball is dropped vertically from rest from a height of 15m on a horizontal floor. It rebounds to a height of 9m. The ball falls down and rises again to an unknown height. What is the height of this second rebound?

7M

8. a) A car weighing 2000N is moving down at 100 road at a speed of 108kmph when brakes are applied causing a constant braking force of 750N. Determine the time required for the car to stop.

8M

b) Two crates are sliding on a frictionless surface as shown in Fig.2 below. The 10kg crate is sliding to the right at 8m/s and the 25kg crate is sliding to the left at 5m/s. The two crates collide and stick together. Use conservation of momentum to find the velocity of the two crates after the collision.

Fig.2

7M

Unit – V

9. a) Define simple harmonic motion, frequency and time period. 6M b) A body is moving with SHM and has amplitude of 4.5m and period of complete

oscillation as 3.5 s. Find the time required by body in passing between two points which are at a distance of 3.5m and 1.5m from centre and are on the same side.

9M

10. a) Derive an expression for frequency of simple pendulum. 7M b) A particle in simple harmonic motion has amplitude of 0.3m and a period of 1 second.

Determine the displacement, velocity and acceleration after 0.4 second from when the particle was at the right end of its path.

8M

question paper code : a3304 (autonomous) b. tech ii … · 2018-12-10 · answer one question from...

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