northern india engineering college, new · pdf filepaper c de: etph-104 subject: ... applied...

Northern India Engineering College, New Delhi


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ENDTE

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..,~.J- U Exam Roll No•....•••••.•••••••.•••.

EXAMINATIONESTER B.TECH. MAY-2010

Subject: Applied Mathematics.1IMaximum Marks.:7~

ue tion from each unit. Q.1 is compulsory.Note; Attempt one

J 3+'Evaluate 0 ~df; cJ0fg he parabola y2= ~ .

i

Find the Lawrent's serieJ. fo f(~) = 3 7~ -; 2 2: in the region given by1 "f.. - "f.. - ;'i.

0< ~+11<1. 5Find the directional der~va ive of <P '= 5 x2Y..-sl~+ - i!x at the point; 2'

.-'..1 . x-l y+3 1:P (1,1,1) m the dlrectlpn fthe lme 2- == ~ = l'Ifa force f= 2,cyi + 3~yj displaces particle in the x-y plane along the curvey == 4x2 from (0, 0) to (!l, ), Find the work done.

1(t)

(e)

(d)

(c)

1 ::.2U Z (1 )-1,.,\ If xxvyzz'=C shoW that.1 a x-=y-=z, -:;::: r- X ogex .(1J • ,), • axOy~) Expandx'y + 3y _ 2 inpJw rs nf (x - I) at (y + 2) ~y usingTaylnr'sseries.Ql

(g) Find the inverse laplaC}et ansform of S\S2+ 1)

(h) Find the laplace transfOI of f(t):;::: It -1\ + It + l\,t ?: O.(3)

(3.5)

(3)

(6)

Ifu = log (.x2

+ i.\ ,\..x+y~

x2£ruof a;;: + 2xy

(c)

UNIT-I

au aurove that x __ + y - = 1. Also find the valueax Oy

£ru+y2 -~x 8y2

(b) lf~~ ~ x'+y' and x' + '+ 3axy~ Sa', findthe vaiue of d< whenx ~ Y~ a.. dxFind the possible pe~ce ta~e error in computing the resistance 1"from the

1 1 1 .•formulae _ . = + _ W 1"1 and 1"2are both in error by 2%.

Q.2(a)

Q.3(a)

1" 1"1 1"2

5x~Given f(x, y,~) == , find the value of x, y,"2 for which f(x, y,~)IX 2y+~

(6.5)

(6)= f n (1") + .!.f' (1").r+

£ruaT

is a maximum.

(b) If u = f(r) where 1"2== 2 + l, prove that ~

UNIT-U1Q.4(a) Showthat the funf'i n u ~ "llog (x'+y') is harmonic,find itsharmonicennjugate. (6)

(h) Shnw that the fl1nc ion w ~ i transforms the straight line x ~ c in the" - plane (6.5)75

into a circle in the - plane.


(a)' Evaluate' J ~:1) (r.<-2) dz, c : \z- II = 3., c

(b) By using contour integr*io

ro '

Jx2dx

o (x2+a2)(x2+b2) = I

method show that

n(a+b)

UNIT-III

(6.5)

6(a) For what values ofb a9d will F = (y+2ev<:) i + y(bx + Q1';) j + (y + cx2) k (6.5)

is irrotationa1. Find the Isc lar ¢ such thatIt = 'V ¢.

(b) Verify Gree~'s Theore1TIi the plane for .r (xy + y2)dx + x2dy, where c is the (6)c

closed curve of the region bounded by y = x at y = x2.

.7(a) Use Stokes Theorem to e aluate J @x - y) dx - yi! dy - Y-'t. ~ ,where (6.5)c

c is the circle x2+y = L c rresponding to the surface of the sphe~e of unit radius.

(b) Use Divergence The0l1e to evaluate J .fF

F.nnds, whp.reF = 4xi +- 2lj +·~?k

and s is the surface bolm ing the region x2+ y2 'F 4,-'t. = 0 and-i':= 3.

UNIT-IV

(6)

.8(a) Use laplace.transform, fi Id the solution of the initial value problem,y" + 9y = 6cos 31, giv~n (0) = 2, y' (0) = o.

(b)

.9(a)

Express the following fu ction in terms of unit step function:

f(t) = {(t-l), l<t3-t,2<t 3

.,and find its laplace tr~n l'OM.~~{IYcs~nvolution 1['he r}emto evaluate:

(S2+ a2)(S2+ b2)

(6.5)

(6)

(6)

(b) A function f(t) obe~s e equation f{t) +- 2 .~ f(t) dt = cos h 2t, find the

laplace transform ofif ( ).

(c) Obtain laplace trans(o of square wave function of period a defined as:

{'l,Q < t < ~ ...

f(t) = a/-1'~2 < t <

(3.5)

(3)


(Please ite your Exam Roll No.) Exam Roll Noo _

END TE EXAMINATIONSECOND SEM~S ER (B.TECH.)- MAY-JUNE 2010

Paper c de: ETPH-104 Subject: Applied Physics-IIPaper i . 99104Time: hours Maximum Marks: 75Note: emptflVe question in all. Qu . n No.1 is compulsory and is of 25 marks (All other questionsare of * marks each). Attempt one q'pe tionfrom each of Units I, II, III & IV. Scientific calculatoris allo d.

The co tants are given to be: c = 3.00 Xi 1 mls; h = 1.054 X 10.34 1.s;k = l.381x 023 JIK = 8.617 x 10.5eVIK.

1. Attempt all the parts I

a). Give the relation betw~en the magnitudes of electric and magnetic vectorsin an electromagnetic wave.b). Defme Poynting vectot.c). Calculate the de Broglie avelength of (i) a 46-g golfball moving withvelocity 30 mls and (b) ~ el ctron moving with velocity 107 mls. Which oneis measurable?d). The uncertainty relatidn x. L\py = 0 is true or false? Justify your answer.e). Define Fermi energy.f). Distinguish between ill . sic and extrinsic semiconductor.g). Find the shortest wavttle gth present in radiation from a x-ray machine wherethe accelerating potential is 50 KV.h).What is piezoelectric effi. t?i). Discuss in brief applic~ti ns of tunnel diode.j). What are Cooper pairs? (2 12x 10 = 25)

UNIT -I2. (a) Setup the equation o~c ntinuity. Discuss its physical significance.

(b) State Gauss's law in 4i erential form. Use this to find the electric field insidea uniformly charged sph~r (charge density cr). (6,612)

3. (a) Write Maxwell's equ:ati ns in differential form for a dielectric material.Discuss physical signifi<r ce of each.(b) What is displacemen,t c rrent? (9,312)

4, (a) Defme phase and gf(~Urepresenting a quan'tu:m p(b) Setup Schrodinger ¢qproperties of wave funcpo

UNIT-IIvelocities and discuss the properties of a wave packet'cleo

tion for a free quantum particle. Discuss the(6,612)

5 (a) Compare the salientife tures ofMaxwell-Boltzrnan, Bose Einstein &Fermi Dirac distributions.(b) What was the main co elusion of the Davisson Germer experiment? (9,3Y2)

1


6

UNIT-Ill(a) Draw the ener~y band qi am of a Zener diode. Discuss its V-Icharacteristics. Mention som of its important applications.(b)..Compare the propertie~ 0 metals, semiconductors & insulators on the basisof the energy band structu~e. (7,5Y2)

7. (a) Discuss the main prop~rt' s of superconductors. Distinguish between the types1& II superconductors. .(b) Discribe Messiner effe~t.© Discuss some of the impo ant applications of superconductors. (7,3,2

1/2)

UNIT-IV

• 8. (a) Discuss various properti s of x-rays. Discuss in brief the physics ofthe: / continuous and line spectra of x-rays.

(b) The smallest angle ofB agg scattering in potassium chloride is 28.40

for0.30 urn x":rays. Find thei di tance between atomic planes in potassium chloride.

(10, 2Y2)

9. (a) Wllat are ultrasonic? iDi cuss its properties and some of its engineering

applications. .(b) What is magetostrictio (10,2Y2)

* * * * * *

2

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Exam Roll No .'te your Exam Roll No.)

END T~ EXAMINATIONSECON S MESTER B.TECH. MAY-2010

de: ETCH106 Subject: Applied Chemistry-IIHours Maximum Marks :75

. Attempt one question from each unit.

a) Predict the type of lily ridization and shape of the following speciesusing valence bond the ry:- (3)(i) IC/4- (ii) XeF2. (iii) CIF3

b) What is the qualita~v difference between the phase diagram of onecomponent and two fO ponent system? (3)

(c) Define intermoleculo/ d intramolecular hydrogen bonding. (2)(d)What are the types ~f olyethylenes formed from the polymerization of

ethane? ' (2)(e) Differentiate between ompetitive and non-competitive inhibitors. (2)(f) Using LCAO metho¢:l, draw the shapes of p-p combination of atomic

orbitals, both axial fts well as sideways. (2)(g)How would you dis~in ish between the triple point and melting point

in the light of phas~ Ie? (2)(h) State will entropy ~n reases or decreases and give reasons for your

answer: - . (2)(i) Sugar dissolves ~nwater (ii)Water freezes to form ice

(i) What are exothermk d endothermic reaction? Explain with suitableexamples. (2)

(j) What is a flame te$p rature? (2)(k)Account for the foUo 'ng:- (2)

(i) Water is liquid ir ile H2S is a gas.(ii)NH3has higher1b iling point than PH3.

(1) What should be tJiteminimum functionality of a monomer to form apolymer? (1)

••

Ql

Q2

Q

UNIT-I(a) What do you unae stand by a molecular orbital? Sketch cr and 1t

molecular orbital~ t at result from the combination of two p orbitalson each atom in a d atomic molecule. (4)

(b)Find out the !flu ber of unpaired electrons in [CoF6J3- and[Co(NH3)6J3+.Whi~h ion is high spin and which is low spin? Which isparamagnetic and hich is diamagnetic? (4)

(c) Write the molecu~ar orbital electronic configuration of 02, 02+ and 02-.Explain which hals 0) shorter bond length (ii)Larger paramagnetism? (4.5)

(a) Write the actual$e metry and type of hybridization in the following:-(i) IF? (ii) CI03 - (i i) PCls (iv) H20 (4)

(b)Bond angle in Ntb is 107.50 and it is 104.50 in water (H20). Explainon the basis ofVS PR theory. (3)

(c) Draw and expllf' Molecular Orbital diagram for CO and explainwhich end of COlis more basic? (5.5)

UNIT-II(a) Define heat capEl-ci , specific heat capacity and molar heat capacity. (4.5)

P.T.O.


[-2-]

and ideal gas equation. What is compressibility(4)

(4.5)5liter

gas In(4)

t postulates of kinetic theory of gases?introduced into an evacuated vessel ofat 270C. Calculate the pressure of the

ntainer.

(a) Compare the real gafactor?

(b)What are the impqrt(c) 109 of oxygen w¢r

capacity maintaineatmosphere in the c

(b)Write the sign of ('!ah one of tV! and 6S when a reaction is alwaysspontaneous and v.{hn a reactive is never spontaneous. (2)

(c) Define an intensive roperty. Is density is an intensive property ornot? Explain. (2)

(d)If the en1tlalpy Of a reaction H2(g)+CI2(g).-.-+HCI(g)at 293K is-91.2KJjmol. Whl\l.t will"be its value at 313K? The molar heat

.. capacities of H2(g), b(g) and ,HCI(g)at constant pressure are 29.3,34.7 and 28.9JK-1t1Il }-l respectively. (4)

Q5.~'j

Q

UNIT-III\(a) State Glbb's phase Ie and explain the following:- (4)

(i) Eutectic point (ii)Congruent point (iii)Consolute temperature(b)Draw the phase djia am of water system. (2)(c) Draw the compo$it on temperature phase diagram of Na2S0

4- watersystem' and label it. (2.5)

(d) Calculate the nutil er of phases, components and degrees of freedomfor the following> (4)(i) S(s)<;=>S(m)<;=>S l)<;::>S(g) (ii) CaC03(s)~CaO(s)+C02(g)

Q (a) Explain homogeI1le us catalysis with at least two examples. (4.5)(b)What are Enzyme Inhibitors? Name and explain a chemical reaction

in which.a chemk poisons the catalyst. (4)(c) Defme and differe tiate between Physiosorption and Chemisorption. (4)

UNIT-IV(a) What do you m<:tat by the functionality of a monomer? Find its value

in the following iffi nomers:- (6)(i) Urea (ii)Ethylene glycol (iii)Terephthalic acid(iv)Formaldehy~e (v)Vinyl chloride

(b)What are hetetr chain polymers? Explain how will you preparefollowing polym~r - (i)Bakelite (ii)PVC? (6.5)

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

9 (a) Write short notes on any four of the following:- (8)(i) Copolymerisat on(ii)Thermosettip. and Thermoplastic polymers(iii)Fibre, Plastic d Elastomers(iv)Vulcanisati<:>Dof rubber(v)Radich chair olymerization(vi)Co-ordination polymetization

(b)What are the ~iff rent methods of determining the molecular weight ofa polymer? A ample of a polymer contains equal number ofmolecules with olecular weights of lxl05 and 2xl0s. Calculate Mn

:'I and Mwof thi~ P iymer. (4.5)


e

(Pleas write your Exam Roll No.) EX/lm Roll No .

RM EXAMINATIONSEMESTER B.TECH. MAY-2010

ode: ETCS10B Subject: Introduction To Programming3 Hours Maximum Marks :75

Note: Q.1 is compul ory. Attempt one question from each unit.

Q. Give a short answer: (2x10,5)

(2.5,5,5)

UNIT-I

{b) Draw fu~fl~w ~h!lrt to Ch CKwhether given numb~r i~primi w not.

Q (a) What are the characteri$ti s of an algorithm?

.. , i How is efficiency ofan~lg rithm characterized?ii) How number '8' is differe t from character '8'?.ii) What is a logical error? pi e few examples of logical errors.'v) What is the purpose of~re rocessor statement Define? Distinguish it from variable

declaration statement.) What is the header file?i) What is Local variable ~nd global variable?ii) What is the purpose of ~w tch statement? Give its general format.iii) What rules should be usbd hile framing for loop.x) What is the merit and dem rit of using recursive function?) What is the relationship1be een array and pointers?i) Name three functions fro string library and their purposes.

(c) Convert the following oc 1number to binary form and print their sum in octal form:31,53,46.

OR

(a) Name varioas component used to design Data flow diagram. (4,3.5,5)

(b) What are the advantages f drawing flow chart?

(c) List some vi editing cOfTI and and corresponding action.

UNIT-II

4(a) Differentiate between Jh integer, integer and long integer type of variable.

(b) List various types of ope tors available in C. Illustrate their order of precedencewith suitable example.

(3,4,5.5)

(c) Write a 'c' program that 'nput three sides ofa triangle. It then determines the typeof triangle (equilaterall' i osceles, scalene) and then prints the sides with appropriatemessage. Show the re~ul of your program for two sets of data:

5,7,117, 19, 19

P.T.O


-2-

5(a) ''Yhat is the output of fol owing program:

int a=lO, b=8, c;c=a++ + b + a++',

Print (% d, ~;c: = ++a + b + ++c;Print (% d, c);

(b) 'Write a program in C,w ich determines whether input year is a leap year or not.It then print out the y¢ar and appropriate message.

,

(c) Write a C program thp.t nput two digit number and print it in words i.e. 23 as

twenty three.

UNIT-III

(3,3.5, \.

.6(a) Write for, while and po while loops to print all the alphabets of English Language (3,5,4.5)

in lower case?

(b) Write a program in C t at input two dimensional array of order in x n. Find out thelargest and smallest 'ilu bers in this array. It should then print these numbers along'with their row, coluJ11n osition in the matrix.

(c) Write a program wh~ch input an array of 10 character and find the number ofduplicate characters" if ny .

.7(a) Explain the differen~e etween passing of an array to a function and passing asingle value data to fu ction.

(b) Write a recursive futlc ion in C to find factorial of a number.

(c) Write a function "swa " that interchange the values of two variables. Use it in the, main program to antan e 11 elements of the array in ascending order.

UNIT-IV

(3.5,3,6)

.';/

Q.8(a) Create a structure dec aration for the employee of an organization consisting (7,5.5)

following fields:employee code, naiine department, date of birth, date of joining, basic salary.Write a program to,pr nt detail~ of the employee whose basic salary is greater than20,000. . .

(b) Write short notes an nion data types, enumerable data types .

Q.9(a) Explain how pointers are used to access array element with an example'ofadding (5,2.5,5)two single dimenslm al array of order 10. .

(b) Explain with exampl how pointers are passed to a functiun.

(c) Write a Program tp r verse the character'of a string.


(l'le 'e write your Exam Roll No.) Exam Roll No .

END T RM EXAMINATIONfl' ---,,-----.-- ,§.~ D SEMESTER ~.!~C'!L~~.!'~!OIO. ]~~ .. ,-.~od!:_~!M~!,!.~ .._. ~r--' .,_.. ~~!!.l*:~t:Engineering MechanicsTi : 3 Hour.~, ,__._.____ . ,____________. _.. _..__. ._Ma~!!'um Marks :75

I Note: Q.1 is cOI(nP lsory. Attempt one question from each unit. ~_. '- _...._.~-,.__._- .._-,-~._----~_.,. __.__.----_.+--- _.~_.._----.---_._----- "-----------------

QJ (a) Explain the conpe t. of 'Free-body diagram'. Draw the free-bodydiagram of a cantile er beam supporting a point load W at its end.

(b) Explain the term$, oefficient of friction, limiting friction and the coneof friction.

(c) State and expla~n with an example the parallel axis theorem formoment of inertia.

(d) State and explain! t eorems of Pappus and Guldinus.(c) Defme a perfect ~r ss and assumptions required to be made for the

analysis. I(1) State and explatn D' Alembert's principle and its advantage over

equations of modo .(g) State the work-¢n rgy, conservation of energy and conservation of

momentum prin¢ip es.(h) Define and expl~n the term, instantaneous centre.(i) Define the term ¢o fficient of restritution and its values for plastic and

elastic collusion$.(j) Define a beam and sketch the different types of beams. (2.5xlO=25)

I

UNIT-I(a) A ball of weighl resting upon a smooth plane is attached at its

centre to two, s'ri gs which pass over smooth pulleys A and Bandcarrying loads d Q.' Find the angle 0 defining the position ofequilibrium an . t e reaction between ball and the horizontal surfacefig(2a). , (6.5)

(b)A smooth cylinqie of radius r=10cm resting on a horizontal surfacesupports a bar t of length 30cm which is hinged at A. The weight ofthe bar is 50N.T e cylinder is kept from rolling away by a string AOof length 20cm. ssuming all surfaces to be frictionless, find thetension in the s~ri g fig(2b). (6)

I

UNIT-IId supported as shown. Determine the reactions at

Iso, detcrmine axial forces in the members CD, CF(12.5)

A truss is loadedsupport A and B,and FG fig(4).

3 (a) Two rectangulcir blocks Wl=150N and W2=100N are connected bystring and rest on an inclined plane and horizontal plane. Thecoefficient of fric ion for all contiguous surfaces is 1l=0.2. Find themagnitude and! d'rection of least force P at which the motion of blockswill impend fig(b ). (6.5)

(b)A rope is wrappe three turns around a cylinder. The rope is held atthe end A with a force of 3.5N. Determinc the value of the weight Wwhich this forGc 'an just support. The coefficient of friction betweenrope and cylinde is 0.30 fig(3b). (6)

4

P.T.O.


1 ••..i-, t /I

(-2-)

5 (a) DetJrmine by <lir .ct integration the co-ordinates of the centroid of theshaded area fo~m d by the intersection of a straight line and the curve

y~12x2 fig(5a). (6)

..--- ...__" ,(b)Determine the m

with respect tpflg(5b).

ments of inertia of the cross-section of an iron-beame centroidal axes parallel and perpendicular to AB(6.5)

Q9 An overhangip beam loaded and supported as shown. Draw the shearforce and bendi g moment diagrams for the beam fig(9). \12.5)

UNIT-IVQ8 (a) A wheel is ade to roll without slipping towards right by pulling a

string wrailP d around the coaxial spool as shown. Determine withwhat velodty the string should be pulled so that the centre of wheelmoves with v locity lOm/s fig{8a). (6)

(b)Two identi~a right circular discs A and B of equal weights and radiiare arrange in a vertical plane as shown. Find the acceleration of

'falling disd fig(8b). (6.5)

Q7 (a) Neglecting fJ1icion and inertia of pulleys find the acceleration of blockQ if the mas~ (f the block P equals mass of the block Q fig(7a). (6.5)

(ti) A sphcrc of tn. ss 2kg is released from rest and strikes a block of mass2.5kg rcstirlg on a horizontal surface. How far the block will moveafter the ito. act? Assume e=O.75 and the coefficient of frictionbelYieen blo~ and the surface is 0.25 fig(7b). (61

YNIT-IllQ6 (a) A car starts, f om rest on a curved road of 250m radius and

accelerates C\l.t a constant tangential acceleration cif O.6m/ S2.Determine th~ istance and time for which the car will travel beforemagnitude ono al acceleration attained becomes O.75m/s

2. (6)

(bl A roadway btld e is in the form of a circular arc of radius 200m. Findthe greas

tspe d with which a vehicle can cross the bridge without

just loosing co tact at the bighest point C of the roadway. IF thespeed of th~ ehicle is reduced to 72km/hr at what point B, asdefined by tPc angle e, the vehicle will just loose contact with theroadway fig{~b). (6.5)

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


113-

p-------- -----

& 100- -

/-'q--, ~ ~yC') 'X.

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------..._ .._~-----

to.

A

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Ve. :::.IAJ "ft) f ~J~'I'\8


Exam Roll No•........•.......•.....

ESTER B.TECH. MA y-2010Subject: Electrical Science

Maximum Marks :75Note: Attempt all qu s 'ons as per internal choice indicated.

(Please wri your Exam Roll No.)

ENDTE"

(4~)(8)

21)...

t 10.n..10 V

.I 2- 13F{~,1.

lain the difference betweeJt odal analysis and Mesh analysis to solve a given network.the nodal analysis to find the currents.16 in various branches of oir uit

wn in fig. I.

a)b)

Q.1.a) Fill in the anks using suitable words $iv n in the brackets. (5x2)i) Usi g Theven'in's theorem a citc 't can be converted into a (voltage/current) sourceii) US! g Norton's theorem a circw.t an be converted into a (current/voltage) source.iiI) In e of a resonant circuit the fo wa relating the resonance frequency (00 ' the Quality

fae r Qo and the Band width ~<IOi «(00= Qo x ~(O, Qo = (00 X ~(O, ~(O = Qo x (00)

iv) (M ving coil/Moving iron) typelin trument may be used to measure both a.c. and d.c. currents.v) A ure resistor/pure inductor) is ot an energy dissipating element

b.) Give sho swers for the following: (5x3)i) If replace the laminated iron. c re of a transformer by solid wooden core what will be

the ffect on (a) Magnetising Cl)UT nt (b) Core losses (c) Copper losses?ii) some times the voltage re$UI tion of a transformer is positive and some times negative?iii) t is the significance ofbac~ e f in a dc motor?iv) an induction motor normall runs at the speeds below the synchronous speed?

.,:;,~

v) some times one of the wattm ters connected in a three phase circuit to measure power bywatt meter method, gives 1).eative reading?

Q.2.

Q.3. a)b)

ORsribe and prove the maximu power transfer theorem for a dc circuit.lculate the current flowing ingalvano meter shown in

. 2 using Thevenin's Theor~m

(4~)(8)

P.T.O.

~\


[-2-]

a)b)

escribe the conditions ofries nance for (a) series and (b) parallel resonant circuits.ompute the current~ 1\. 12 .

d 13in the a.c. circuit

hown in figuie 3.iven6} =4+j3~2 =: 10 +j6 n. 63 = 8+j4n

oioovli IV

(4~)(8)

25 n..

A

OR F1,g.3Define and explain the conce t of time constant in relation to an R-L series circuitFor the parallel circuitshown in figure 4, computethe value of XL to producethe condition of parallelresonance.

Q.5. a)b)

OREstablish the equivalent eirc it of a transfomer on no load and under load conditions. (5~)Describe the various losse$ i a tranfonner and derive the conditon ofits maximum efficiency. (7)What are the materials us¢d or the following parts of a dc machine, explain their functions. (5)i) Rotor core ii) Commtl-ta or bars iii) Yoke iv) Brushes v) Pole shoes.Calculate the speed of a 4 p Ie 50Hz, 400V, 3 phus~ ir:duction mDtor when it is operating at (7Yz)

a slip of 1.5%.OR

Describe the torque slip dh acteristic of an induction motor and indicate the following (5)points on it (a) starting torq e (b) maximum torque, (c) slip for max. torqe, (d) synch speed,

(e) full load speed.The armature of a dc gen~r tor has a 2 pole winding with a total of 10 coils having 19 turns (7~)

each. If the flux per pole is 0 mwb compute the generated emf.

~ .. '·1

Derive the emf equation of a transformerThe low and high voltage wi dings ofa 240/3300V, 50liz. single phase transformer haveresistances of 0.3 mn andO. 5 mn respectively: Determine the cun-ent and inpute powerwhen the H.T. winding is $U plied from 11Ov,50Hz mains and the LT, winding is short

circuited

b)

Q.9. a)

Q.7. a)b)

---.Q(. a)

b)

....................


(Please rite your Exam Roll No.) Exam Roll No••..•.••••.•••...•••.••

EXAMINATIONSECO EMESTER B.TECH. MAY-2010

ode: ETEL114 Subject: Communication Skills·1IHours Maximum Marks :75

Note: Q.1 is comp, Is ry. Attempt one question from each unit IQl Write short notes on th~ £ llowing:-

(a) Listening skills

(b)Barriers to commun~c

(c)Argumentative Writi(n (with suitable examples)

(d) Speech mechanism

(e) Functions of a coveIj1 tter

(f) Role of moderator il1a group discussion.

(4)(5)

(4)(4)(4)(4)

Q2 Discuss the rolecommunication.

UNIT-Iracy, brevity, clarity and appropriateness in

(12.5)

(12.5)

Q3 Explain with suitaij>le examples that the new communicationtechnologies have chcln ed the way we communicate and the way wework. (12.5)

UNIT-IIQ4 Discuss· the structurct f a formal report. What are various stages of

report writing? (12.5)

Q5 Bring out the differen¢e between a CV and a Resume. Prepare a resumeto apply for the job of fill Assistant Engineer in a Construction Company.(12.5)

UNIT-IIIQ6 What is non-verbal cp munication? Underline the importance of body

language in an oral p*s ntation. (12.5)

Q7 Transcribe the following words:- (12.5)(a) Swift (b) Major (c) Detail (d) Church (e) Paper (f) sound(g)Creche (h) Prepare (i)Nerve (j) Justify (k) Cold (1) Bright

UNIT-IVQ8 Discuss group discus~i n as part of selection process.

Q9 What are the incUvi ual traits which one should reflect whileparticipating in the gJto p discussion? (12.5)

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