(please write your Exam Roll No.) Exam Roll No .

END TERM EXAMINATION

SECOND SEMESTER MAy-JUNE 2017
~----------------------------~------~----------------------------,
Paper Code: ETEN 114 Subject: Environmental Studies
Time: 3 Hours Maximum Marks: 75
Note: Attempt any five questions including Q.No. 1 which is compulsory. I
Select one question from each unit

Ql. Attempt all parts of the following: (2.5xlO=25)

a) What are the objectives and guiding principles of environmental
education?
b) Explain that 'Decomposers are very important in an ecosystem'.
c) What are the differences between endangered species and endemic
species?
d) Explain the concept of atom economy with suitable example.
e) Explain the term NOAEL and LOAEL.
f) What do you mean by Bioremediation?
g) What are the consequences of population growth?
h) Explain OTEC (Ocean Thermal Energy Conversion) Process in brief.
i) Explain the terms "toxicant, toxic, toxin and toxicity.
j) What do you mean by photosensitizers or Promoters? Why are
these added to polymers? Discuss.

Unit-I
Q2. a) Explain the concept of food chain, food web and ecological pyramid. (4.5)
b) Discuss the consumptive and productive values of biodiversity. (4)
c) What do you understand by ecological succession? (4)

Q3. a) Define ecosystem? Explain the, structure and function of an

ecosystem. (6.5)
b) Write short notes on Hotspots of biodiversity. (3)
c) "The flow of energy is one way and continuous in ecosystem". Justify.
(3)
Unit-II
Q4. a) Write a detailed note on negative impact of modern agriculture on
environment. (5)
b) Write short notes on: i) Solar energy ii) Surface and subsurface
mining iii) Water Logging (2.5+2.5+2.5)

Q5. a) What are the alternative energy resources? Differentiate between

renewable and non-renewable natural resources. (5)
b) Write short notes on: i) Salinity ii) Hydrothermal energy
iii) chemical fertilizers. (2.5+2.5+2.5)

Unit-III
Q6. Write short notes on the following: (4+4+4.5)
a) Biochemical effect on Mercury b) Photo-biodegradable polymers'
c) Waste water treatment

Q7. Write short notes on the following: (4+4+4.5)

a) Photochemical smog b) Biopolymers and Bio-plastic
c) Solid waste management
P.T.O.

E'£~-\\'-'
 [2]

Unit-IV
Q8. Write short notes on the following: (4+4+4.5)
a) Flood Disaster Management Map
b) Problems of urbanization
c) Environment Impact Assessment

Q9. Explain the following terms: (4+4+4.5)

a) Ozone layer depletion
b) Wasteland reclamation
c) Sustainable Development

***************
(please write your Exam Roll No.] Exam Roll No .

END TERM EXAMINATION

SECOND SEMESTER MAY-JUNE 2017
Paper Code: ETHS-112 Subject: Communication Skills
Time: 3 Hours Maximum Marks: 75
Note: Attempt all questions as directed. I

Ql Correct the following sentences: (lxlO=lO)

(a) The movie is too good.
(b)Walk fast, lest you should not miss the train.
(c) Mr. Smith and his family generally go to the church on Sunday
morning.
(d)We often deceive us.
(e) I am searching my mobile.
(f) I founded a mobile on the road while coming back from college.
(g) On last Sunday, we went on a picnic.
(h) India's economy is more stronger than Pakistan.
(i) The evidence prove that he is guilty.
0) Sorry, I am not recognizing you.
Q2 Convert the given direct speech into indirect speech: (lx5=5)
(a) He said, "Lisa, do you have any answer"?
(b)"I am not going to help you", he told me.
(c) He said, "I can speak four languages."
(d)"You shouldn't take my laptop."
(e) The boy said to his friend, "I am waiting for you here now."

1
Q3 Write the homophones of the given words: (10 x -2 = 5)
(i) maize (ii) rain (iii)pale (iv)ring (v)hue
(vi)queue (vii) carrot (viii)allowed (ix) break (x) all.

Q4 Complete the sentences with a suitable phrasal verb. (lx5=5)

get down to, hit upon, snapped at, threw up, cast aside.
(a) The sick child while waiting at the doctor's.
(b) Let's not waste any time now and business straight away.
(c) She the report indignantly.
(d)After a series of failures, the scientist finally an idea as to
how to keep a room cool without using air conditioners.
(e) I felt a shiver down my spine as the bulldog suddenly me.

Q5 Change the voice of the following sentences: (lx5=5)

(a) Who taught you to ski?
(b)Instructions will be given to you by the director.
(c)The kangaroo carried her baby in her pouch.
(d)She faxed her application for a new job.
(e) A scathing review was written by the critic.

Q6 Use these idioms in sentences of your choice. (1x5=5)

(a) Go bananas (b) At sixes and sevens (c) Green eyed monster
(d)To lie dormant (e) A far cry

P.T.O.
 [-2-]

Q7 Read the passage carefully and attempt the questions:

What distinguishes humans from animals? For some it is language, for
others it is the altruistic willingness to help other members of the
species. However, this kind of altruism seems to exist in the animal
world as well. Researchers working with Crisophe Boesch at the Max
Planck Institute for Evolutionary Anthropology in Leipzig observed that
West African chimpanzees adopt the orphaned young, even though they
are not related to them. Several animals lavished care on a juvenile for
several years. Surprisingly, half of these adoptive parents were male.

This behaviour is thought to be encouraged by the pressure of leopards,

with whom the West African chimpanzees share their habitat. The
constant threat from the big cats seems to have encouraged cohesion
and solidarity within the group. Accordingly, the scientists observed
more chimpanzee adoptions in West Africa's Tai National Park than in
East Africa.

Wild chimpanzees appear to be more prepared to help than those living

in captivity. In zoos, chimpanzees cooperate with other members of the
group to only a very limited extent. 'Our observations show that altruism
in wild chimpanzees is much more widespread than studies of
chimpanzees in zoos would suggest', concludes Chrisophe Boesch.

(a) Give a suitable title for the passage. (1)

(b) What does the author want to establish by suggesting that animals
are altruistic? (2)
(c) What surprises the author while discovering the adoptive streak in
animals? (2)
(d) In the expression 'this behaviour is thought to be encouraged ... .' the
word 'this' refers to which meaning? (2)
(e) Write a precis of the above given passage. (3)

Q8
.
Write a paragraph on anyone topic:
(a) An encounter that changed your life. (5)
(b) Adults are merely obsolete children.

Q9 Write a short note on anyone of the following: (5)

(a) Expository writing
(b) Narrative writing

QI0 Attempt any two: (10x2=20)

(a) "A well arranged speech is seldom a bad speech." Do you agree with
this hint on public speaking as suggested by James Bryce? Give
reasons for your answer.
(b)What did Kalam mean when he said that he had pushed a 'hold'
bu tton on his life?
(c) What, according to Dr. Salim Ali, is the main reason for ecological
imbalance?

***********
(please write your Exam Roll No.) Exam Roll No .

END TERM EXAMINATION

SECONDSEMESTER .TECH MAy-JUNE 2017
Paper Code: ETME-ll 0 Subject: Engineering Mechanics
ATC~ : 2o\~ DN\,l~~DS
Time: 3 Hours Maximum Marks: 75
I Note: Attempt any five questions including Q no. 1 which is compulsory. I

Ql Short questions:- (5x5=25)

(a) Classify the force systems.
(b) State and proof varignon's theorem with example.
(c) Explain cone of friction.
(d) State and explain D'Alembert's principle.
(e) What are the assumptions involved in analysis of a perfect truss?

Q2 Derive the expression of the ratio of tensions for the belt pulley system.
(12.5)

Q3 Find the forces in all the members of the truss shown in figure. (12.5)
40l<N
\-y>:
~o~¥ ~ \',1

T
~, I I
4m
/_--L--~__
~.-
,.,
i_~__ .se: J
- ~---7~1
. //////

\ooJf-- _ !" ~------ - -----~

Sr'IY) -:l m ~ 'm
Q4 Describe the method of finding centre of gravity of composite bent wires.
(12.5)

Q5 (a) Three identical tubes of weights 8 kN each are placed as shown in

figure. Determine the forces exerted by the tubes on the smooth walls
and floor. (6.5)

(b) State and prove parallel axis theorem. (6)

Q6 Derive the expression for the coefficient of restitution. (12.5)

P.T.O.
E',f") 6-\ \0 l~")

~\/~
 [-2-]

Q7 Draw the shear force and bending moment diagram for the beam shown
in figure. , j
(12.5)
15 KN pi t<N
A ,
k--
~"C{"r'''Y"Y\,_,.'~ _
+ ----
._-.
B
l' L:) 1KN/rn

~!!" f 4 W'\ -t--~J!\_-

\------,-o-W) I
Q8 (a) A straight rod AB, 50 em long has one end B moving with a velocity of
4 mis, and the other end A moving along a vertical line YO as shown
in figure. Find the velocity of the end A and of the midpoint of the rod
when it is inclined at 60° with horizontal. (6)

,
( , ~,;_ B
.u:-.
I.
-:/...., 'rn/ S
r", ~~.- ...
V '.J J
I,: ; 1 : :/ 1

y. j

(b) A stone falls freely from rest and total distance covered by it in last
second of its motion equals the distance covered by it in first three
seconds of its motion. Determine the time in which the stone remains
III air. (6.5)

************

6'~Mf,-\\O C~ ')
~~/Y
(please write your Enrolment No.) Enrolment No .

END TERM EXAMINATION

SECOND SEMESTER rB.TECHl MAY-JUNE 2017
~---------------
Paper Code: ETPH-l04 Subject: Applied Physics-II
(Batch 2013 Onwards)
Time: 3 Hours Maximum Marks: 75
Note: Attempt any five questions including Q.no.l which is compulsory.
Select one question from each Unit.
~---------------

Q1 Attempt each one of the following: (2.5x10=25)

(a) Define divergence and curl of a vector.
(b) Distinguish between displacement current and conventional current.
(c) Find constant a, band c so that
V = (x + 2y + az)i + (bx - 3y - z)j + (4x + cy + 2z)k is irrotational.
(d) Describe the implication of Davisson-Germer experiment.
(e) Why is the energy of a particle trapped inside a box quantized?
(f) An electron is confined to move between two rigid walls separate by 2
x 10-9 m. Find the deBroglie wavelengths representing the first three
allowed energy states of the electron.
(g)What are the postulates of quantum theory of radiation?
(h) Copper has fee structure and the atomic radius is 0.127 nm. Find the
ratio of the spacing of (111) and (123) planes.
(i) Draw the planes (100), (110) and (111).
(j) Define Fermi energy. What is its physical significance P

Unit-I

Q2 (a) Derive Maxwell's equation and express it in integral form. Give the
physical significance of each. (8)
(b)Write down the equation of continuity and mention its physical
significance. (2)
(c) A plane electromagnetic wave is travelling in an unbounded lossless
dielectric medium with relative permeability Jir = 1 and permittivity
e; = 3. Find the velocity of the wave and the impedance of the
medium. (2.5)

Q3 (a) Derive Poynting theorem from Maxwell's equations and give its
'1 interpretation. (6)
(b) Show that in free space the direction of flow of electromagnetic energy
is along the direction of wave propagation. (4)
(c) Find the skin depth at a frequency of 90 Hz in aluminium where
c = 3.54 X 107 mhojm. Also find the wave velocity. (2.5)

Unit-II

Q4 (a) Distinguish between a boson and a fermion. Give one example each.(4)
(b)Write down the Planck's formula for the distribution of energy in
spectrum of blackbody. Show that Rayleigh-Jean's law and Wein's
Law are special cases of Planck's radiation law. (5)
(c) Draw a neat diagram showing the energy distribution spectra of
blackbody radiation. Explain how classical theory fails to explain the
spectral distribution of energy. (3.5)
P.T.O.
E''"\ ~\-\-\o,-\ C~)
'\\ 1'1---
 [-2-]

Q5 (a) Derive Schrodinger time dependent wave equation for non-relativistic

particle. Give the physical interpretation of Hamilton operator, H. (6)
(b) State the properties of wave function in a quantum mechanical
system. Give one example each for an acceptable and non-acceptable
wave function. . (4)
(c) An electron has a 'speed of 2 x 104 m/s within the accuracy of 0.01 %.
Calculate the uncertainty in the position of the electron. (2.5)

Unit-III

Q6 (a) What do you understand by packing factor in crystals? Calculate the

packing factor in the case of bee an.d fee lattices. (4.5)
(b) What do you mean by lattice constant? Obtain a relation between the
lattice constant of a cubic crystal and the density of the crystal
material. (4)
(c) Define Miller indices. If a, b, and C are the primitive vectors of the unit
cell a plane of Miller indices (310) cut the crystal lattice, find the
intercepts of the plane along the three axes. (4)

Q7 (a) What are Schottky and Frenkel defects? Obtain an expression for
concentration of Schottky defects in a crystal. (6)
(b) Why do we use X-rays to study crystal diffraction? Is it possible to
observe diffraction pattern if radiation of wavelength 2 x 10-6 m is
incident on a crystal with interplanar separation of 10-8 cm? Justify.(4)
(c) Lead has fcc structure and its body diagonal is 0.86 nm. When X-rays
o

of wavelength 0.71 A undergoes diffraction from (110) plane to

produce second order maxima, calculate the glancing angle. (2.5)

Unit-IV

Q8 (a) What are Brillouin zones? How are they related to the energy levels of
an electron in a metal? (4)
(b) Define the effective mass of electron. Obtain an expression for
effective mass of an electron moving in a periodic potential. (5)
(c) Where does Fermi level lie in an n type semiconductor? Discuss the
effect of temperature and doping concentration on the position of the
Fermi level in an n type semiconductor. (3.5)

Q9 (a) What is Hall effect? Derive an expression for Hall coefficient. Explain
how the measurement of Hall coefficient helps to determine the
mobility of electron in metals. (7)
(b)The Hall voltage for the metal sodium is 0.001 mV, measured at
I = 100mA, B = 2 Wb/m2 and width of the specimen is 0.05 mm.
Calculate the number of carriers percubic meter in sodium. (3)
(c) Distinguish between intrinsic and extrinsic semiconductors. (2.5)
***********

.S-r~\\-\t)\.\ l~)
?rl--v
 (Pleasewrite your Exam Roll No.) Exam Roll No•.•..................•.

END TERM EXAMINATION

SECOND SEMESTER MAY-JUNE 2017
Paper Code: ETEC-106 Subject: Electronic Devices
Time: 3 Hours Maximum Marks: 75
Note: Attempt any five questions including Q.no.l which is compulsory.
Select one question from each Unit.

Ql (a) Differentiate between conductor, insulator and semiconductor using

energy band concept.
(b) What do you understand by drift current & diffusion current? Write
an equation for net electron current in a semiconductor.
(c) What is meant by Zener & Avalanche breakdown in p-n junction
semiconductor diode?
(d) List the advantages of hybrid parameter. Draw the h-parameter model
of a transistor in CE configuration.
(e) What are universal gates? Implement AND, OR & NOT gate using
universal gates. (5x5=25)

Unit-I

Q2 (a) What is Fermi level? Show that is an intrinsic semiconductor the

Fermi level is located at the middle of unallowable energy gap. (6.5)
(b) Prove that the conductivity of a semiconductor is given by
(J = q (nile + Pllh)' (6)

Q3 (a) Explain the band structure of open circuited p-n junction. (6.5)
(b) Explain how semiconductor parameters vary with temperature. (6)

Unit-II

Q4 (a) What is meant by de & ac resistance of a diode? How these resistance

can be determined from its V-I characteristics. (6.5)
(b) Describe the piecewise linear approximation model of a diode. (6)

Q5 (a) Write short note on: (6)

(i) Tunnel Diode
(ii)Photo Diode
(b) Draw the circuit diagram of bridge rectifier. Explain its operation.
Find de and rms output voltage. Also find its ripple factor. (6.5)

Unit-III

Q6 (a) Define the following W.r.t BJT. (6.5)

(i) leo (ii) a (iii) 13 (iv)lebo(V) Iceo
(b)A transistor has Ib = 100~ and Ie = 2mA, Find [i] a (ii) 13 (hi) Ie. If Ib
changes by +25~ and Ie changes by +6mA. Find the new value of 13.(6)

Q7 (a) Draw Ebers-Moll model for a PNP Transistor and give the equations
for emitter current and collector current. (6.5)
P.T.O.
E \"E-c...-\ \:) b
«i..
L
 [-2-]

(b) Explain input and output characteristics of a transistor in CB

configuration. Give reason why CE configuration provides large
current amplification while the CB configuration does not. (6)

Unit-IV

Q8 (a) Sketch the cross-sectional view of an enhancement mode MOSFET.

Explain its operation and characteristics. (6.5)
(b) State and prove De Morgan's theorem. How is it helpful in minimizing
the given Boolean expression? (6)

Q9 (a) What are Analog and Digital Signals? Why binary number system is
preferred in digital systems. (6.5)
(b) Minimize the following function using the Booleans algebra: (6)
Y = ABeD + ABC D + ABCD + ABeD + ABeD + ABeD + AB CD + ABeD.

***********
(Please write your Exam Roll No.} Ex:am Roll No .

.END TERM EXAMINATION

SECOND SEMESTER .TECH MAy-JUNE 2017
Paper Code: ETMA 102 Subject: Applied Mathematics-U

(Batch 2013 onwards)

Time: 3 Hours Maximum Marks: 75
Note: Attempt any five questions including Q.No. 1 which is compulsory.
Select one question from each unit.

Ql. a) If u= log (X3+y3+Z3_'3xyz),

show that
0 0 0 )2 -9 / ./ (5)
[ ox + oy + oz u = (x+ y + z y . /
b) Using Cauchy-Riemann equations, show that/the function f(z)=23is
analytic in entire z-plane. (5)
c) Define impulse function and hence obtain its Laplace transform. (5)
d) Calculate the volume of the solid bounded by the surface x=O, y=O,
lx+my+nz=I and z=O. (5)
ej Solve the partial differential equation by Charpit's method. (5)
(p2+q2)y=qZ.

Unit-I
Q2. a) Expand f(x,y)= x2y +3y-2 in powers of x -1 and y+ 2 using Taylor's
expansion. (6.5)
b) If x+ y+z= u, y+z=uv, z= uvw, show that (6)
o(x,y,z)
--'---'---'- = u 2 v.
o(u, v, w)

Q3. a) A rectangular box, which is open at the top has a capacity of 256
cubic feet. Applying Lagrange's method of undetermined
multipliers determine the dimensions of the box such that the least
material is r.equired for the construction of the box. (6.5)
b) If z= f(x,y) where x= e cos v and y= e sin v, show that
U U

oz
y-+x-=e- OZ OZ
-. 0\ (6)
au av ay
Unit-II
Q4. a) Find the inverse Laplace transform of s+~ (6.5)
s(s -I)(s< + 4)

b) Find the Laplace transform of unit step function u(t-a), also find
the Laplace transform of t2u(t-3). (6)

Q5. a) Using Laplace transform solve the following differential equation. (6.5)

y"+2y'+2y= 5 sin t, where y(O)= y'(O) =0.

b) Evaluate, using Laplace transform (6)

i) J: ie:" sin tdt.

ii) r0
sint d
-t- t.
P.T.O.

E'-,('C\ \=-\ - \ ~ '"2-

\?\ j"l---
 [2)

Unit-Ill
Q6. a)
Find the image of I z I =1 under the transformation co = _.i -_,z onto
the w plane. l+z
b) (6.S)
Show that the function z I z I is not analytic anywhere.
(6)
Q7. a) Expand

fez) = 1
,J < I. z I <2.
(z-l)(z-2) (6.S)
b) Using contour integration in complex plane evaluate
(" dB (6)
Jo 3 + 2eas e
Unit-IV
Q8. a)
Evaluate f f (x2+y2)dxdy throughout the area enclosed by the curves
y=4x, x+y=3, y=O and y=2. (6.S)

b) Use Green's theorem to evaluate. (6)

f
t
(x
2 2
+ xy)dx + (x + y2 )dy where C is the square formed by the lines
y=z l , x=±l.

Q9. a)
Apply Stoke's theorem to calculate f 4ydx + 2zdy + 6ydz, where C is

the curve of integration X2+y2+Z2=6z

and z= x+3.
(6.5)

b) If a force F = 2X2 yi + 3xyj displaces in the xy-place from (O,O)to

(1,4) along the curve y=4x2, find the work done. (6)

***************
(Please write your Exam Roll No.) Exam Roll No .

END TERM EXAMINATION

SECOND SEMESTER rB.TECHl MAy-JUNE 2016
Paper Code: ETCS-108 Subject: Introduction to Programming
(Batch 2013 Onwards)
Time: 3 Hours Maximum Marks: 75
[ Note: Attempt any five questions including Q. no. 1 which is compulsory. \

Q1 Write brief note on following:- (5x5=25)

(a) Structures Vs Unions.
(b) Switch statement Vs Multiple if.
(c) Break Vs Continue.
'(d) Linker, Loader Vs Compiler.
(e) Formal Vs Actual Arguments.

Q2 (a) Differentiate between auto, static, extern local and global variable
with respect to their lifetime, scope and access rights. (6)
(b) Differentiate between do-while and while-do loop with the help of an
ex~mple. (6.5)

Q3 (a) Write a program in C which reads a string and after finding its length,
program print back the string in reverse order. Do not use any in built
function. (6)
(b) What do you mean by enumerated data types? Are they different from
strings? Explain their use. '(6.5)

Q4 (a) Differentiate between Sequential/Random files in terms of the 'time

taken for insertion, deletion and updation of records. (6)
(b) Explain different classifiers for formatted outputs with example. (6.5)

Q5 Give function name, syntax and corresponding header file to achieve the
following:- . . (12.5)
(a) To open a file in read mode.
(b)To clear the input buffer.
(c) To clear the output buffer.
(d)To read the buffered strings.
(e) To read the character Un-buffered.
(1) To read the whole line from input.

Q6(a) Write a program in C which reads an array of size n, find how many
numbers in the array are even, odd and count them and print the
information. (6)
(b) Write a program in C which reads a array of integers. Each element of
. the array is replaced by its square. Print back the array. (6.5)

Q7 (a) Differentiate between call by value and call by reference parameter

passing mechanism with the help of an example. (6)
(b) In C, when arrays are passed to the Junction, which mechanism do
they follow? Is there any relation between pointers and array's name?
Explain. (6.5) .

***********
(Please write your Exam Roll No.) Ex:am Roll No .

END TERM EXAMINATION

SECOND SEMESTER MAY- JUNE 2016
.Paper Code: ETEC-106 Subject: Electronics Devices
(Batch 2014 onwards)
Time: 3 Hours Maximum Marks: 75
Note: Attempt any five questions including Q.No1 which is compulsory.
Select one question from each unit. Assume missing data suitably if any.

Q1 (a) Describe the properties of Intrinsic and Extrinsic semi conductors.

(b) What do you mean by thermal runaway of a transistor? Explain.
(c) Explain the working of negative clipper with its circuit diagram.
(d) Why does Fermi level shift toward conduction or valence band with
doping.
(e) Define h-parameter and hence derive h-parameter model of a
transistor in CE configuration. (5x5=25)

UNIT-I
Q2 (a) What are energy bands? How are these formed? Distinguish between
a conductor, an insulator and a semiconductor on the basis of energy
diagram. (6.5)
(b) A slice of intrinsic silicon bar is 3mm long and has a rectangular
cross section 50~m *10~m. At 300K, determine the electric field
intensity in the bar and the voltage across the bar when a steady
current of 2~ is measured.
Take the value of resistivity=2.30* lOsOcm at room temperature (300K).(6)

Q3 (a) Define diffusion capacitance. Derive an expression for the same. (6)
(b) Show that the Fermi level of an intrinsic semiconductor lies much
closed to the middle of the band gap. How does the intrinsic carrier
density depend upon the band gap? (6.5)

UNIT-II
Q4 (a) Name the important process that occurs during the formation of a p-n
junction. Explain briefly with the help of suitable diagram, how a p-n
junction is formed. Define the term 'barrier potential'. (6.5)
(b) Why is Zener diode considered as a special purpose semiconductor
diode? Draw the I-V characteristics of Zener diode. Describe briefly
with the help of a circuit diagram how a Zener diode works to obtain a
constant DC voltage from the unregulated DC output of a rectifier. (6)

Q5 (a) Write short note on:- (6)

(i) LED
(ii) Schottky barrier diode
(b) Explain the working of a half wave rectifier. Also determine ripple
factor, efficiency and peak inverse voltage. (6.5)

P.T.O.
 [2]

UNIT-III
Q6 (a) For the circuit shown in the figure given below, find Ie, VB,VE, Rd6.5)

Vec. ~ H1 V

Ylo k...tl.

'Vc.:: \ 2.. V

f:. ~ \~
v o' I··'

B
1---,0 'VE
1,2. k,..!l-

(b) What is biasing? Discuss the factor which causes bias instability in a
transistor. (6)

Q7 (a) Draw and explain the input and output characteristics of a transistor
in CB configuration. Indicate the cut off saturation and active region.(6.5)
(b) Find the operating point for the voltage divide bias circuit with ~=80
and VBE=0.6 V. Find the new operating point when ~ changes to 100
and VBEchanges to 0.25V. Given Vcc=15 V, R1=100Kn, R2=18 KG,
Rc=4.7 xo, RE=lKO. (6)
UNIT-IV
Q8 (a) Draw the hybrid 1t model of a transistor and explain the significance of
each component in the model. (6.5)
(b) Explain the I-V characteristics of N channel enhancement mode
MOSEFT an.d indicate the distinct regions of operation. (6)

Q9 (a) Explain the neat circuit diagram, the operation and characteristics of
a JFET. Distinguish between n- channel and p-channel JFET. (6.5)
(b) Determine the minimum cost SOP expressions for the function
F(Xl,X2,X3,X4)
= 2:m(4,6,8,10,12,15)+ D(3,5,7,9) (6)

**********
(please write your Exam Roll No.) Exam Roll No .

END TERM EXAMINATION

SECOND SEMESTER MAY-JUNE 2016
Paper Code: ETEN-114 Subject: Environmental Studies
(Batch 2013 onwards)
Time: 3 Hours Maximum Marks: 75
Note: Attempt any jive questions including Q no. 1 which is compulsory. Select
one question from each unit.

Ql Attempts all parts:- (2.5xlO=25)

(a) Functions of an eco system.
(b) Explain with examples the terms of food chain and food webs.
(c) What are the Environmental consequences of deforestation?
(d) Discuss the problems of salinity and water logging.
(e) What is zero waste technology?
(f) Explain the qualities and applications of poly lactic acid.
(g) Justify that bioaccumulation can be a necessary as well as harmful
process for organism survival.
(h) Differentiate between Acute and Chronic Toxicity.
(i) Describe the various types of natural disasters.
m Discuss the Environmental problems associated with urbanization.

UNIT-I

Q2 (a) Describe the various threats to Biodiversity. (5)

(b) What are the major Global Environmental Problems? (4)
(c) How does the nutrients and the energy flow from one organism to the
other? (3.5)

Q3 (a) How does an aquatic ecosystem support a wide range of Biodiversity?(5)

(b) Explain Biodiversity and its three levels - Genetic, Species and
ecosystem diversity. (5)
(c) Write short notes on Endangered Species. (2.5)
.
UNIT-II

Q4 (a) Unequal distribution of food has resulted in various food problems.

Describe world food problems. (6)
(b) What are the causes and consequences of deforestation? (6.5)

Q5 (a) Explain the consequences of over exploitation of surface Water

Resources. What are the techniques for Water Harvesting for
Conservation? (6.5)
(b) What are wind mills? What are the merits and demerits and demerits
of Wind Energy? (6)

UNIT-III

Q6 Write short notes on the following:-

(a) Photodegradable Polymers. (4)
(b) Clean Development Mechanism. (4)
(c) Soil Pollution. (4.5)
J

... P.T.O .
 [-2-]

Q7 Write short notes on the following:-

(a) Solid Waste Management (4)
(b) Carbon di-oxide Sequestration (4)
(c) Biochemical effects of Arsenic Toxicity. (4.5)
UNIT-IV

Q8 Explain the following terms:-

(a) Disaster Management steps for an Earthquakes. (4)
(b) Disaster Management steps for a Nuclear Accidents and Holocaust. (4)
(c) Consumerism and Waste Products. (4.5)

Q9 Explain the following terms:-

(a) Floods and its types (4)
(b) Acid Rain. (4)
(c) Wasteland Reclamation. (4.5)

***********
 (Please write your Exam Roll No.) Exam Roll No .

END TERM EXAMINATION

SECOND SEMESTER [B.TECH] MAY-JVNE 2016
Paper Code: ETHS-112 Subject: Communication Skills
(Batch 2013 Onwards)
Time: 3 Hours Maximum Marks: 75
I Note: Attempt all the questions as directed. Internal choice is indicated. I

Ql (a) Correct the following sentences (any 10):- (10)

(i) Hamid assisted one to get at the point.
(ii) His conduct admits no excuse.
(iii)I have already read a few books that are on the shelf.
(iv)You, my son, is a good boy.
(v) Madhu was leading a happy and leisurely life after her retirement
from her service.
(vi)This is the best which we can do.
(vii)Our only guide in the forest were the streams of water.
(viii)I congratulated my friend for his success.
(ix)He neither offended him nor his brother.
(x) Sunny told his father that he will be late.
(xi)Let us discuss about the topic.
(xii)They have returned back from Switzerland.

(b) Describe the theme of "What I Believe"/ "Work Brings Solace". (7)
(c) Give a technical description of anyone of the following:- (8)
A pen drive, a solar panel, natural geyser,

Q2 (a) Fill in the blank with suitable prepositions (any 5):- (2.5)
(i) The crowd pressed the wall.
(ii) He was wandering the forest.
(iii)He inquired ..•............. the matter.
(iv)We should not quarrel.. pretty affairs.
(v) I am angry your going without leave.
(vi)He lives Mumbai.

(b) Fill in the blanks with the correct tenses of the words given In
brackets:- (4)
(i) If he hadn't (be) ill, he (attend, meeting) .
(ii)They (can, win) the competition if (work, hard) .
(iii)What (he, do) when you reached there.
(iv)He (write) a letter to his grandfather yesterday.

(c) Change the following sentences as directed:- (6)

(i) You said to me, "I have been very ill." (Indirect narration)
(ii) She said to him, "Shall I bring tea for you?" (Indirect narration)
(iii)I said to him, "Never make a promise you can't keep."
(Indirect narration)
(iv)You call him. (passive voice)
(v) He has read a number of books. (passive voice)
(vi)One should keep one's promise. (passive voice)

P.T.O.

VI
 [-2-]

Q3 (a) Make sentences with the following phrasal verbs, idioms to clarify
their meaning (any 4):-
back up, tell upon, pull together, gift of the grab, account for, sit on
the fence, cut down. (4)

(b) Give the antonyms of the following word using appropriate prefixesr-
Centralize, loyal, violence, accurate. . (2)

(c) Give the synonyms of the following words:-

Amiable, scanty, timid, crafty (2)

(d) Use the following words in sentences (any five):-

Affect, effect, complacent; vein, vain; temper, tamper (2.5)

(e) Give one word substitutionfor the following:-

(i) A lover of books,
(ii) Study of environment,
(Hi)Aperson working only for money,
(iv)That has no equal (2)

Q4 (a) Read the following passage and answer the questions that follow:-
Man has always dreamed of, but never actually lived in, a Garden of
Eden. It is of essence of the human condition that man lives not in a
complaint but in a resistant environment, an environment which he
must constantly make an effort to control, if he cannot wholly master
it. Man's physical and social situations are ever setting tasks for him
in which he must somehow efficiently adapt means to ends. For if it is
inherent in man's situation to have to expand 'efforts' to cope with the
environment, it is also in his nature to have a limited amount of
energy for this general effort. Man everywhere and at all ,times,
therefore, has had to make at least some this effort efficiently and
economically.
(Bernard Barber)
(i) In what sort 'of atmosphere does a man live? (2)
(ii)What is inherent in man? ' (2)
(iii)Write a precis of the passage. (3.5)

(b) Describe the significance of visuals in technical writing with an

example. (5)
OR '
Describe characteristics of a good piece of technical writing. (5)'

Q5 (a) Answer the following in about 250-300 words:- (7.5)

Describe the guidelines given by L.A. Hill for writing in a systematic
way.
OR
Describe the experience of flow as explained by A.P.J. Kalam.

(b) Write a para on 'informal communication' in an organization. (5)

OR
Write a General Notice informing the employees the change in
reporting timing of the office, (5)

***********
t;\ y(~ -\\"L-
?2--J'1-
(Pleasewrite your Exam Roll No.) Ex:am Roll No .

END TERM EXAMINATION

SECOND SEMESTER B.TECH MAY-JUNE 2016
Paper Code: ETMA-I02 Subject: Applied Mathematics-II
(Batch 2013 onwards)
Time: 3 Hours Maximum Marks: 75
Note: Attempt any five questions including Q.no.l which is compulsory.
Select one question from each Unit.

Q1 (a) Change the order of integration in the following integral and evaluate:
r4 r2#X
Jo Jx2 dy dx. (4)
4a
~ (b) Prove that the function sinh z is analytic and find its derivative. (4)
(c) The 2rr - periodic function f(t) is given by fet) = a sin cot , 0 < t < tt
w w
tt 2rr
=0 -<t<-
w w
Find its Laplace transform. (4)
dz .
(d) If z = .Jx2 + y2 and x3 + y3 + 3axy = Sa2, find the value of dx' when
x = y = a. . (4)
(e) Expand tan-l~ in the neighborhood of (1, 1) using Taylor's Theorem.(4)
x
a (u v) y2_x2
(f) If u3 + v3 = X + y, u2 + v2
, = x3 + y3 ' show that --'-
a (x,y) =.
24 v (u-v)
. (5)

Unit-!

au au au
Q2 (a) Ifu =f (r,s,t),
.
where r
x
x
y
- y
y z
= -.xz
Prove that x-a + Y-a + z-a = 0.(6)
= -,S = -,t z
(b) If the sides and angles of a triangle ABC vary in such a way that its
circum radius remains constant, prove that ~
cas A
+~
cas B
+ .ss:
cas c
= 0.(6.5)

Q3 (a) Find the maximum and minimum distances from the origin to the
curve Sx2 + 6xy + Sy2 - 8 = a. (6)
2
(b) Solve the following differential equation (x ~ y2 - Z2)p + 2xy q = 2xz.(6.5)

Unit-II

2
Q4 • (a) If L (t sin wt) = (2
S
WS )2'
+w 2
Evaluate: L (wt cas wt + sin wt). (4)

. (b) Evaluate: L [f; e t sin t dt]. (4)

. (c) A function f(t) a<t <

is given by
4t for t > 1
f(t) = {t2 for 1}.
Express it in terms of unit step function and then find its Laplace
transform. (4.5)

Q5 (a) Applying convolution, find the inverse Laplace transform of the

functi
unction: (s+L) 1(S+9)2 • (6)

(b) Solve dy
dx
+y = cos Zt , yea) = 1, using Laplace transformation. (6.5)

P.T.O.
 [-2-]

Unit-III

Q6 (a) Obtain the Taylor series expansion of fez) = 1 about z = o.

' zZ+(1+2i)z+2i
Also find its radius of convergence. (6)

eZdz
(b) Evaluate: ~c (Z-l )(z+3 )2 where c: I z I == 10.
(6.5)

Q7 . a2_b2
. (a) Show that the transformation w = z + --4z
transforms the circle of
radius ~,2 centre at the origin, in the z-plane into an ellipse of semi
axes a and b in the w -plane. (6.5)

' (b) Evaluate the integral! = J,a27r 2+sm

de
e using the residue calculus.
(6)

Unit-IV

Q8 (a) Ifr = Xl + yJ + zk and Irl = r. Show that div r", r = (n + 3)rn. (6)
(b) Evaluate ~c F. (£. by Stoke's Theorem. Where F = y2l + x2J _ (x + z) k
and C is the boundary of the triangle with vertices at (0, 0, 0), (1, 0, 0)
and (1, 1, 0). (6.5)

Q9
(a) Evaluate the follOwingintegral fa1 faVI-x faxyz
..jl-x2_y2 2
dzdy dx.
(6)
(b) Apply divergence theorem to find J fs F. it ds,
where
F = (2x + 3z)l- (xz + y)J + (y2 + 2z)k and S is the surface
of the
sphere having centre .at (3, -1, 2) and radius 3.
(6.5)

***********
~"

(please write your Exam Roll No.) &amRollNo .

END TERM EXAMINATION

SECOND SEMESTER MAY-JUNE 2016
Paper Code: ETME-110 Subject: Engineering Mechanics
(Batch 2013 onwards)
Time: 3 Hours Maximum Marks: 75
Note: Attempt any five questions including Q no. 1 which is compulsory. Select
one question from each unit.

Ql Short questions:- (2.5x10=25)

(a) State the various assumptions for the analysis of a perfect truss.
(b) Explain cone of friction and angle of friction.
(c) Explain the meaning of MA, VR and Efficiency of a screw jack.
(d) What is a point of contraflexture in case of a beam?
(e) Discuss various type of supports used in engineering structures.
(1) What are the advantages of method of section over the method of joints in
case of a truss?
(g) Define the coefficient of restitution and instantaneous centre of rotation.
(h) What is self locking in case of a machine and how you will verify whether a
machine is self locking or not?
(i) Derive the expression for the moment of inertia of a semi circle about its
base.
OJ Discuss the significance and applications of moment of inertia of a body.
UNIT-I
Q2 Three identical spheres P, Q, R of weight W are arranged on smooth inclined
surface as shown in the figure 1. Determine the angle e
which will prevent the
arrangement from collapsing. (12.5)

Q3 Two blocks A and B are connected by a horizontal rod and are supported on two
rough planes as shown in Figure 2. If weight of block B is 1500N and coefficient
of friction of block A and B are 0.25 and 0.35 respectively, find the smallest
weight of block A for which the equilibrium exist. (12.5)

UNIT-II
Q4 Determine the forces in the members BC, CE and DE of a truss loaded and
supported as shown in Figure 3. (12.5)

Q5 Determine the moment of inertia of a cast iron section shown in Figure 4 about
both X and Y axis. (12.5)

UNIT-III
Q6 In a system of connected bodies (Figure 5) the pulleys are frictionless and of
negligible weight. Determine the value of weight A required to give 0.6g
acceleration to weight B (i) in downward direction (ii) in upward direction. (12.5)

Q7 Two smooth spheres A and B having a mass of 2kg and 4kg respectively collide
with initial velocities as shown in Figure 6. If the coefficient of restitution for the
spheres is e = 0.8, determine the velocities of each sphere after the impact.( 12.5)

UNIT-IV
Q8 Draw the shear force and bending moment diagram for the cantilever beam
loaded as shown in Figure 7. (12.5)

Q9 A reciprocating Engine mechanism is shown in Figure 8. The crank OA is of

length 20 ern and rotating at 500 rpm. The connecting rod AB is 100 ern long.
Find the angular velocity of the connecting rod and velocity of piston B. (12.5)
P.T.O.

~T(Y)'E..-\\o

~JY-
 l1a (I)
10/<'" -

i i:1 J< IV

I~C"", -~

F, -(4) l' --
~ ~'tJ~
 (Please write your Exam Roll No.)

Exam Roll No .
. END TERM EXAMINATION
SECOND SEMESTER
Paper Code: ETPH 104 MAY-JUNE 2016

Subject: Applied Physics-II

(Batch 2013 Onwards)
Time: 3 Hours Maximum Marks :75
ote:
Attempt any five questions including Question NO. 1which is
compulsory. Select one question from each units. Symbols have their
~ usual meaning. Scientific calculator is allowed.

Q 1. Attempt all the parts.

a) Find the gradient of a vector
2 "3
A = (x - xy + z)i + (x - xz + x) j" + (y 2 - Y + z)k "
at point(2, 1, 1). (2)
b) Write the expression of gradient in spherical coordinates. (2)
c) Give the expression of Gauss's law for magnetic field In both
differential and integral form. (2)
d) How will the equation for Poynting theorem change for static
fields? (2)
e) Write the expression for general wave equation. Show how it
changes in case of a dielectric medium. (2)
f) Calculate the value of wave impedance in vacuum. (2)
g) State the significance of normalization of a wave function. (2)
h) Are energy levels of a particle in a box equally- spaced? Show with
appropriate equation. (2)
i) What thermodynamic statistics do electron follow, Bose-Einstein,
or Fermi Dirac? (2)
j) Draw the plane in a unit cube represented by the miller indices
(110). (2)
k) A p-type semiconductor has a Hall coefficient equal to
0.0 125m3 IC. Find the density of charge carrier in it. (3)
1) State Bloch Theorem. (2)

Q2. a) Unit-I
Show that the trajectory of motion of a charged particle in crossed
electric and magnetic fields (constant) is a cycloid. (6)
b)
What is skin depth in electromagnetic? Does it depend upon the
frequency of the electromagnetic radiation? (2.5)
c)
Write the Maxwell equations in differential form and state their
significance. (4)

Q3. a)
An electric field in a region is given by E= -3i +4j -5k. Calculate
·b)
the electric flux through the surface S= 2.0 X10-sm2. (2.5)
Discuss continuity equation. Distinguish between conduction
current and displacement current. (4)
c)
If the earth receives 20 call mini sq em solar energy, what are the
d) amplitudes of electric and magnetic fields of radiation? (4)
A 2kW laser beam is concentrated by a lens into cross-sectional
area about 10-6 crn-. Find the Poynting vector. (2)

P.T.O.
 [2}·

Unit-II
Q4. a) Using the uncertainty principle
show that an electron does not
exist inside a nucleus. (4)
b) Describe Davission-Germer experiment. Find the lowest energy in
eV, for an electron in one dimensional box of length a ==O.2nm. (6)
c) d2
The eigenfunction of an operator -2 f//(X) ==e": Find the
dx
corresponding eigen value.
(2.5)
Q5. a)
What type of statistics shall be application for a gas of photon?
. Justify your answer. (2.5)
b) Compare the qualitative features of Maxwell-Boltzmann, Bose-
Einstein and Fermi-Dirac statistics on the basis of their functions. (6)
c) Show that Bose Einstein, Fermi Dirac statistics reduces to Maxwell
Boltzamann statistics at high temperature. (4)

Unit-III
Q6. a)
Chromium has structure. It has atomic radius IS O.125nm.
Calculate the free volume/unit cell. (4)
b) Describe with a proper diagram the following terms: (a) Unit Cell,
(b) Packing factor, (c) Coordination Number (d) fee. (4)
c) Deduce the Miller indices of a plane which cuts off intercepts in
the ratio la: 3b: -2c along the three axes. (2)
d) What is the difference between (Ill) and <I 11> for miller indices. (2~5)
Q7. a)
Define the following (a) Unit Cell (b) Primitive Cell (c) Primitive
Lattice (d) Bravis Lattice. (4)
b) Germanium crystallizes in diamond form structure with 8 atoms
per unit cell. If lattice constant is 5.62 Angstrom, calculate the
density of Germanium. (2.5)
c) Write short notes on (a) Point Defect . (b) Frenkel Defect
(c)'Schottky Deffect. (6)

Unit-IV

Q8. a) Describe Kronig- Penney Model. .

(4)
b) Define law of mass action for a semiconductor. (2.5)
c) How does the location. of Fermi level change with doping of a
semiconductor?
(6)
Q9. a) Derive the expression for Hall coefficient.
(4)
b) 'What are Brillouin zones?
(2.5)
c) Show that the Fermi energy lies midway between the conduction
band and valance band for an intrinsic semiconductor. (6)

*.***********

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