Chemisty Stream (2013-January) Question Papers

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dUSN lOMATl1

First Semester B.E. Degree Examination, January 2013Engineering Mathematics - I

Time: 3 hrs. Max. Marks:100

Note: 1. Answer any FIVE full questions, choosing at least two from each part.2. Answer all objective type questions only in OMR sheet page 5 of the answer booklet.3. Answer to objective type questions on sheets other than OMR will not be valued.

PART _ AI a. Choose the correct answers for the following :

i) The Leibnitz theorem is the formula to find the n'h derivative ofA) trigonometric function B) exponential function C) product of two algebraic functions D)product of two functions

ii) The n'h derivative of 5* is : A) log 5, 5- B) (log 5)" 5. C) g(loss)* D) (log 5;2 . ttoss)*

iii) The value of 'c' of the Cauchy mean value theorem for f(x) : e., g(x) : e-* in (3, 7) is : A) 5 B) 3iv) The generalized series of Maclaurin's series expansion is

A) Taylor series B) Exponential series C) Logarithmic series D) Trigonometric series (04 Marks)

b. VerifoRolle'stheorem forthefunction f(x)=x2(1 -x)2 in0<x< l andalsofindthevalueof c. (04Marks)

c. If sin-' y = 2 log(x + l), prove that (x +7)' y,*r+ (2n + 1)(x +1)y,, + (n2 + 4)y" = 0 .

d. ExpandbyusingMaclaurin'sseries,thefunction 1og(1 +sinx) uptofifthdegreeterms.

2 a. Choose the correct answers for the following :

i) Thecurver= a intersectorthogonallywiththefollowiirgcurve:A)r= b B).= g).- D)r-' r+coso l-cosO '-r*r,ng ' l-sine cosO

ii) If$ be the angle between the tangent and radius vector at any point on the curve r: (e), then sin $ equals to

A)q B)r€ c).€ D).9ds ds dr de

L Hospital's Rule can be applied to the limits of the form : A) 0/0 B) 0 x co C) oo - co

Lt 1alt* - 1)x is of the following form : A) 0 x co B) co - co C) *" D) 0-

b. Evaluate lim (tanx)"o'-.x +p r,2

c. Findtheradiusofcurvatureforthecurve x'y=a(x'+y') atthepoint (-2a,2a).

d. Find the Pedal equation for the curve r( 1 - cos 0) = 2a.


: A)0 B)9 -3f

: A)p B)l C)0 D)e

lf an error of l% is made in measuring its base and height, the percentage error in the area of a triangle isA) 0.2o/o B) 0.02o/o C) 1o/o D) 2%

iv) One of the necessary and sufficient condition for a function to have a maximum value isA)AC B',>0, A<0 B)AC-82=0,A:0 C)AC-82<0, A>0 D)AC-82>0, A>0

ii i)

iv)

C)0 D)4

(06 Marks)

(06 Marks)

D) *o(04 Marks)

(04 Marks)

(06 Mark)(06 Marks)

(04 Marks)

(06 Marks)

(05 Marks)

(05 Marks)

D) none of these

D)xi+yjB)-l c)0 D)3

D) 2(x - y + z) (0,1 Marks)

(06 Marks)

(06 Marks)

(04 Marks)

b.

c.

d. In calculating the volume of right circular cone, erors of 2Yo and I %o are made in height and radius of the base respectively. Find the

i) If f(x,y):+.+.-]--.then *9T*y4 i,x' y' x'+y' ax ' fuii) lf x: p cos 0, y : p sin 0, z: 2,1.,.n 6(x, y, z)

a(i,e,rl

If V = e'0 cos(a log r) . prove that * - 1+.1* = oar- r ar r' cld'

Examine the function f (x, y) = 1 + sin(x2 + y'; for extremum values.

4a.


i) The value of "/j.o, * .in, x dx is A) 1lg9

b.

c.

d.

percentage error in the volume.

Choose the correct answers for the following :

i) If F - VO, then the curl F : A) solenoidal B) irrotational C) rotationalii) IfV:x2+y'+3thengradVis: A)2xi+2yj B)Zx+2y C)2xi+2yj+kiii) Thevalueof'a'ofthevector p=(x+3y)i+(x -22)j+(x+az)k,whichissolenoidal: A)-2iv) lfR:x2y *y2z+z2x,then LaplacianofRis : A)x+y+z B)x-y-z C)2(x+y + 71

Find div F and curl F, where F = V(x3 * y' * ,t - 3xyz) .

Prove that curl (0 D) = 0 curl il + grad 0 x [.Show that the cylindrical system is orthogonal.

PART _ B

#-aQ..Y^-."**_. \'!" :I (;kFE i iintL t Ir(ql rIYt;:nffr. t,ij:\ -'-"-"" t:

cgsS?ft&E-Lfuf.lst14.Y

B) l/100 C) ,T/100 D) 99l100

ii ) The curve y'{a' * x') = *'(a' - x'.) isA) symmetric about the x-axis B) syrnmetric about the x & y axis

iii) The length of the arc y: (x) from x: a to x : b is

B) 3/8

b. solve !I-2x-Y+1.dx x+2y-3

c. Solve dr + (2rcot 0 + sin 20)de = 0 .

d. Find the orthogonal trajectory of the family of coaxial circles x] * J' = t .

a' b'+La. Choose the correct answers for the following :

', [;]

IOMATII

C) symmetric about the y-axis D) none of these

dx D) none ofthese

C) 1116 D) trl4 (04 NIarks)

(0,1 \Iarks)

(06 Marks)

(06 Marks)

.,[: :]

(04 Marks)

(06 Marks)

(06 Marks)

(04 Marks)

D) all of these

(04 Marks)(06 Marks)

(04 Marks)

(06 Marks)

')i

b. Obtain the reduction formula for lsin" x d,x .J

c. Evaluare JrJu* - x

2 dx .

d. Find the ul.u ofun arch ofthe cycloid x: a(0 - sin 0) , y = a(l - cos 0).

a. Choose the correct answers for the following :

f , . z--12

it Theorderand degreeofthedillerentialequation l,-[!f)'I =.9L respecively is

[ (axi.] dx'

A) one, two B) one, one C) two, one D) three, two

ii) The differential equation Il+e',,.|d**.. '[r-Ildv = 0 isL J L vl 'A) homogeneous and linear B) homogeneous and exact C) non-homogeneous and exact D) none ofthese

iii) Thesolutionofthedifferential equation!I="**': A)e**ev:c B)e'+e-v:s C)e'-s-v:s D)e'*v-sdx

iv) Replacing dyldx by -dx/dy in the differential equation of(x, y, dy/dx) = 0, we get the differential equation ofA) polar trajectory B) orthogonal trajectory C) trajectory D) none ofthese

b.

c.

d.

8a.

i) The normal form of the matrix are A) [:, 0]

ii) Thesolution ofthesimultaneous equations x+y:3, x-y:3 is

A) only trivial B) only unique C) unique and trivial D) none oftheseiii) In Gauss Jordan method, the coefficient matrix reduces to matrix

A) diagonal B) unit matrix C) triangular matrix D) none oftheseiv) Ifristherankofthematrix[A]ofordermxnthenris: o/r.;T

olUr.=n C)r>n D)r>m (04Marks)

Findtherankof thefollowingmatrixbyelementarytransform, o=1, , , , I^

l; ; ,, ',.] 104 varks)

Findforwhatvalueofkthesystemofequations x+y+z=1, x+2y+42=k, x+4y+62:k2, possesasolution.Solvecompletely in each case. (06 N,tarks)

Solve the following system of equations by Gauss elimination method: x+ y +z:9; x-2y + 3z: 8; 2x+ y z- 3 (06 Mark)

Choose the correct answers for the following :

i) Ifthe determinant ofthe coefficient matrix is zero, then there existA) trivial solution B) non-trivial solution C) unique solution D) no solution

ii) If P is the modal matrix of an orthogonal matrix, then its inverse matrix is equal toA) P' B) P C) diagonal matrix D) none of these

iii) The quadratic form for the matrix o - f a tr'l is : A) ax2 + 2hxy+by'z B) ax2+by2 C) ax2+2bxy+2by2 D) none of these

Lh bliii) The nature of the quadratic function of the matrix having the eigen values [0, 2, 4l is

A) positive definite B) positive semi-definite C) negative definite D) negative semi-definiteb. Reducethematrix,=l-, rl tothediagonal form andhence findAa.o

L-, ol

c. Find all the eigen values of the matrix I s - 6 z I .

o -l-u , -ol12 -4 3l

d. Reduce the quadratic form 3xr + 3y2 + 322 + 2xy - 2yz + 2zx into canonical form.

,.(#)'.(*)'

USN O6MAT11

First Semester B.E. Degree Examination, December 2012Engineering Mathematics - I


Note: l. Answer any FIW full questions, choosing at least twofrom each part.2. Answer all objective type questions only on OMR sheet page 5 of the crnswer booklet.3. Answer to objective type questions on sheets other than OMR will not be valued.

B)

c)

doo!0.

oo

3e

;h-tloo'Eoo.= on(!<-

Y.)otr-oo>E*a:

oo)60

o0cU=>€-o(gr?o'iaor=? (.)s9.tro.o''oj

a=

6,iLO

o.r>,:trooo=sotr>o-

lr<-C.Iooz

Loo.

PART _ AI a. Choose your answers for the following :

i) If y: sin2x , )h"" , r.,

A) -2".or[ 2* * + I\ 2)

C) 2'-' ,n( z*+ +)\ 2)ii) If y: xlog(x+l) then yn is

^, (-l)n-'(n-l)!xA' G + l)'"1

B) 2'-'"or(r, .+)

D) tan ' 3.

D) P2: r'a*

(04 Marks)

(04 Marks)

(06 Marks)

(06 Marks)

(04 Marks)

D) -2'-'rir(2, .+)

(-l)',-'(n - 2)!(x +

(x + 1)'

D;None of these.

A) cos-r3 B) coft3 C) tan-r

iv) Pedal equation of the curve r'cos m0 : a' l.S

C) pr*-r = a*A) r'-1 = a* B) P' = a''r'-rb. Find y, , if y : e-3'cost*c. If y"* * y-r/rn =2x,prove that (x2 - l)yn*z + (2n+l)xyn*r * (n2 * m2)yn:0d. Find the angle betweenthe curves r: a 1og0, r: a/ log0.

a. Choose your answers for the following :

)^ x' 0u Av.i) If u='- .then x +y---isequaltoy dx 'AyA) 2u B)u c)0 D)t

A) nu B) n2u C) n(n- 1)u D) n(n+l)u.

(-1)*'(n-2)!(x+n)(x+l)

iiD The angle of intersection of the curves r

^) ^) ^)ii) If u is a homogeneous function of order n is x&y then x2 {} *z*v {*+ y2 9-u i,ox- oxoy oy-

iii) If x: rcosO , y: rsin011r.r, #* is equal to6(r,0)

c)lr

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cE$1"Ec'F"t"

L!B$,EETY

a0

l+0'

A)1 B)r D)0

O6MAT1I

ir) E i, calledx

A) Absolute effor B) Relative error C) Percentage error D) Absolute & relative error.

c.

d.

tf u = cosec-'l-!] '''' l' 'I x' ' + Y- -]

" Rrove that

, O'u ^ O2u , i,u tanu [13 tan'ul-L )vtt

--L -l

-f,-

|

0x' 'AxAy 2 112 12 ]

If u= Y', u ='*,w='Y, showthat ?(P'v'w) -Ox y z O(x,y,z)

(04 Marks)

(06 Marks)

(06 Marks)

(04 Marks)

If the H.P. required to propel a steamer varies as the cube of the velocity and square of thelength prove that a 3oZ increase in velocity and 4oh increase in lengths will require anincrease about 17% H.P.

3 a. Choose your answers for the following :

ft

i) Jsin'xdx is equal to0,

A) zero B) 2!35

.. *. dxu) I .- rs equal to

;'tt+x')'z '

8 _8A)_n B)-15 15

d.

4a.

Area of the cardiodefr

A) lr'de'J0

r: a(1+cos0) isfi

B) 2 Jrde0

iiD The shape of the curve ,' : t cos 20 isA) Three leaved B) cycloid C) cardiode D) Lemnisate of Bernoulli

iv) The curve f fu - ^) : *' (a + x) passes through

c)z35

c)115

D) 1135

,) lr1

b.

A) origin B) Node C) x-axisn/2

If I,,,n: Jsin'' xcos'xdx ( m> 0, n> 0 ); showthat In,.,n:0

a

Evaluate l(*' + a')t ' dxJ'0

Trace the curve r: a sin30

D) y-axis

n-1 ln,,.n-2 (0.1 Marks)m+n

(06 Marks)

(06 Marks)

(04 Marks)Choose your answers for the following :

i) Length of one arch of the cyliod x: a(t - sint), y: a(1 - cost) is

A)-8a B)8a C).r/I-a D):8a

ii) Surface area of revolution about x-axis is s :

B)ndxA)

D)n

iii)

cl ] i..o,eaetoD) 2icosede

0

,;b],,-(t)'

.\ ^€A

iv) Length of the loop of the curve x : t2 , Y : t- t3l: is

O6MAT11

D 4J1

(04 Marks)+ cos0) revolved

(06 Marks)

(06 Marks)

N 2J1 B) - 4",5

b. Find the area enclosed by the asteroid x2t3 + i2t3 : ;t/3 .

c. Find the area of surface of he solid generated when the cardioid r: a(l

,, ill

,r#

about the initial line.

d. Prove ttrat ^'i log(1+ Y s ' x)

0

=rffi-r]

B) r'v'

B) sinl=cxx

PART _ Ba. Choose your answers for the following : (04 Marks)

D Homogeneous differential equation can be reduced to a differential equation by

substitutionA)x+Y:v B)Y:vx C)xY:v

ii) (1 + xy)ydx + (1 - xy)xdy: 0 then I.F. isD)x-y:v.

D+x-y-N 2*>?

iii) The equationy - 2x: c represenls thg orthogonal trajectories of the familyA)y:ae-2* B)*+ZS?:a2 C)xy:a D)x+2y:a

iv) The general solution of the differential equation 1' = ' + tanl is'dxxx

A) sinl: cx

A) Conditionally convergentC) Divergent

- l- r l-n')'lr+:l is

"L n-l

A) Oscillatory

By Raabe's test

A) Monotonic decreasingC) Oscillatory

C) cosl = cxx

B) Absolutely convergentD) None of these.

B) DivergenceD) Convergency

"orl = "x(0,f Marks)

(06 Marks)

(06 Marks)

(04 Marks)

D)

b.

c.

d.

Solve (x - ylogy + ylogx)dx + x(logy - logx)dx: 0

Solve *, I - x'y - -yo cos xdx

Test for self orthogonality rn: a sin n0.

Choose your answers for the following :

.2345r) Ihesertes F-T*?-T+........... rs

6a.

ii)

iii)

B) Convergent C) Divergent D) Absolutely convergent

limit [,, IIun is convergent if I -' - I I

n -) colun+l lA) Equal to one B) Greater than one C) Less than one D) None of these.

iv) t-l*1-1*l byLebnitz'stest' 234 5

b. Testthe series for convergence. 1*{ + 3'6'9 +................4 4.7 4.7.10

3 of4

(04 Marks)

c.@ ( ?\n-

Find the nature of the series ),1 t -: I;i\ n)x' x' xo

Test the series x + " + " +-i-+..... lor absolute convergence.2! 3! 4l

Choose your answers for the following :

D The sum of the direction cosines of a straight line isA) zero B) one C) constant

ii) The equation of a straight line parallel to the x-axis is given by

O6MAT11

(06 Marks)

(06 Marks)

(04 Marks)

D) None of these.

d.

7a.

x-a v-b z-cI LT 111- x-a v-b z-c

/ r\\-i

-001

- x-a v-b z-cu\Ut 011x-a v-b z-c

I l\ 't00iiD A line makes angles &, F, y with the co-ordinate axes then sin2cr + sin2B + sin2y :

b.

c.

A)1 B)2 c)3iv) Three lines are coplanar if

A) They ate concurrentB) A line perpendicular to each otherC) They are concurrent and a line is perpendicular to each of themD) None of these.

Show that the angle between two diagonals of a cube is cos-'13

Find the equation of the plane which bisects the line joining (3, 0,

angles.Find the shortest distance between the lines and its equations:

*-8_ y+9 =z-10 u.rd *-15 _y-29 _r-5

3t67 3 8 -s

D)0

(04 Marks)

5) and (1,2, -l) at right(06 Marks)

(06 Marks)

(04 Marks)

B) grad$.u + $div uD) (Q.v)u + (u.v)$

C) Inotational D) Angular velocity

D)0

d.

8 a. Choose your answers for the following :

i) Curl($u) is equal toA)$gradu+ugrad$C) (grad $)xu + $(curl u)

ii) If curl F : 0 then the vector F is said to be

A) solenoidal B) Rotational

iii) If 7: xi + yj + zk then V. i is equal to

A)3 B)2 c)1

b.

c.

iv) If F : V(x3 + y3 + z3 - 3xyz) then curl F isA)6(x+y+z) B)(x+y+z) C)1 D)0.

Find the directional derivative of $ : xy2 + yz3 at (1,2, -l) in the direction normal to thesurface xlogz->?:-4 at(-I,2,1). (O4Marks)

Find the constants a and b such that

F:(axy + z3)i+ (3x2 - z)j + (b*r' - y)k is irrotational and find the scalar function such that

F: V0. (06 Marks)

d. IfA: 2*i_ 3yzj+ vt2kand i :2r-x3y find A : v0 and (Axv$) at (1, -1, 1). (06Marks)

JJ&&g

4 of4

USN 06crIBt2t22

First/Second Semester B.E. Degree Examination, December 2O1^2

Engineering GhemistryTime: 3 hrs. Max. Marks:100

Note:I. Answer FIW full questions choosing at least two from each port.2. Answer all objective type questions only in OMR sheet page 5 of the Answer Booklet.

3. Answers to objective type questions on sheets other than OMR will not be valued.

c.

d.

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oCd!o.

oo

EPbo!

-y-d9

-*lltrca.E o.rcB+

9doe-cOo>*.^

a:

oc).6Oo!40tr

-o>!/66r

-?oo{=

o- 6.tro.o''oi5=tootE

!o5.Y>'!oo"iboo=sotr>=oo

U<+Noo

oa

PART. AI a. Choose the correct answer :

i) Which of the following is not a primary fuel.A) Wood B) Crude petroleum oil C) Naturalgas

ii) The following is used as antiknock agentA) Triethyl lead B) Biethyl lead

iii) Photo voltaic cell is used to getA) Light energy B) Heat energy

iv) Specific heat of water isA) 2.5kJ kg-' B) 3.0 kJ kg-1

C) Tetraethyl lead D) Lead bromide

C) Electrical energy D) None of these

A) Cation onlyC) Cation and anion

ii) The primary reference electrode isA) Calomel electrodeC) Standar hydrogen electrode

iii) Glass electrode is

A) ion - selective electrodeC) Membrane electrode

B) Anion onlyD) Colour of the solution

B) Hydrogen electrodeD) Zincelectrode

B) H;" selective electrode

D) All ofthese

(04 Marks)

D) Kerosene


(06 Marks)

(04 Marks)

(04 Marks)

D) Spongy lead

C) 8 kJ kg-' D) 4.2k1kg-l/t<b. Define gross and net calorific value of a fuel.c. What is photo voltaic cell? Explain the working of a photo voltaic cell.d. Calculate the gross calorific value of a sample of coke from the following data :

Mass of coke: .006 kg ; Water equivalent of calorimeter:2.5 kg ;

Mass of water : I .3kg ; Specific heat of wate r : 4.187 kJ kg-t k-' ;

Rise in temperature : 1.5K.

2 a. Choose the correct answer :

i) The conductance of an electrolytic solution depends on the conduction of

iv) The element which is kept at the top of electro chemical series isA) AE B) C, C) ZN D) Lr

Define standard electrode potential and derive Nernst's equation for electrode potential.(05 Marks)

What is a reference electrode? Explain construction and working of calomel electrode.(05 Marks)

Write the half - cell reactions and net - cell reaction for the cell.

c01,, I cd'*(o.olM) ll c,'z.(0.5M) I c,,,1

The standard reduction potentials of cadmium and copper are - 0.40V and + 0.34 V,respectively. Calculate the e.m.f. of the cell. (06 Marks)

a. Choose the correct answer :

i) Anode material used in lead - acid battery is

C) CU

cES{T',is&'x-

LISR&BV

A) Ms B) PbO2

ii) The products produced in MeOH-Oz fuel cellA) COz + HzO B) CO + H2O C) COz + Nz

iii) Which of the following is a classical batteryA) Ni - Ca B) Lr- MnOz C)

iv) L1 metal is used in Lt - M,Oz battery because itA) Light B) Hard c)

Zn - alris

Heavy

06clJint2t22

D) None ofthese

D) Ni-MH

D) Non - Corrosiveb.

c.

d.

Explain the following battery characteristics :

i) Cycle life ii) Shelf life iii) Energy density. (06 Marks)

Explain the construction of Pb - acid battery. Give the reactions during discharge andrecharge. (06 Marks)

What are fuel cells? Explain the construction and working of Hz - Oz fuel cell. (04 Marks)

Choose the correct answer :

i) When a metal is corroded(04 Marks)

A) Metal is converted into its compound. B) Metal compound is converted into metalC) Brightness of the metal increases D) Hardness of the metal decreases.

ii) Which of the following metal gives sabrificial protection to iron against corrosionA) SN B) Cu C)K D) Z,

iil) Corrosion process involves reaction of metal withA) oz B) HzO C) Oz and HzO D) None ofthese

irr) If nuts and bolts are made up of different match, the corrosion is due toA) differential aerationC) causticembittlement

B) differential metalD) None of these

b.

d.

b.c.

d.

Define corrosion of a metal. Explain electrochemical theory of corrosion taking iron as anexample. (06 Marks)Explain the effect of the following factors on the rate of corrosion of a metal :

D Temperature ii) Relative areas of anode and cathode iii) PH. (06 Marks)Explain water - line corrosion with an example. (04 Marks)

PART _ BChoose the correct answer :

i) Use of HCHO in electroless plating of Cu is to ,

A) Oxidation C, B) Reduction of copper ionsC) Conversion of Cu** into C, D) Both B and C

ii) Use of levelers in electro plating is toA) increase the thickness of coatingC) to make the deposit brighter

iii) To coat an irregular article uniformly, the bath used is

(04 Marks)

A) Acid bathC) Neutral bath

B) decrease the thickness of coatingD) achieve uniform thickness of coating.

B) Alkaline bathD) of good throwing power

iv) During electro plating of an article, current density employed isA) High B) Low C) Optimum D) None of these

What is electroless plating? Mention any two advantages of electroless coating. (04 Marks)Discuss electroless plating of Copper. (08 Marks)

Write a note on decomposition potential. (04 Marks)

Choose the correct answer : (04 Marks)i) During titration of HCt against NaOH conductance decreases initially because

A) HCt is a strong acid B) NaOH is a strong base

C) Highly mobile H* ions are replaced by less mobile Na* ions

D) Reaction takes place slowly.

a.

ii) During estimation of FAS potentio metrically the indicator electrode used is

06cIJEl2l22

(06 Marks)(06 Marks)(04 Marks)

(04 Marks)


c. Explain synthesis and uses of i) Teflon ii) Butyl rubber.d. Write a note on thermoplastics and thermosetting plastics.


i) Temporary hardness in water is caused byA) Ca(HCO:)z B) CaCt z C) CaSO+

B) Calomel electrodeD) Ag/AgC0 electrode.

C) Polyester D) Silk

B) Thermosetting plasticD) Addition polymer

B) Hexamethylene diamineD) Phenol formaldehyde

B) Fluro carbon polymerD) Thermo setting polymer

D) MgCt2

B) speed up the process of dissolutionD) BothA&C

B) ColloidalimpuritiesD) Dissolved salts

A) Platinum electrodeC) Glass electrode

iii) In Colorimetric determination of copper the colouring agent used is

A) NH4 C0 B) NH4NO3 c) (NH4)2 04 D) NH4 OHiv) Colorimetry involves measurement of absorbance using monochromatic light in the

A) Visible range B) I R range C) UV range D) Smallrangeb. Distinguish between thermotropic and lyotropic liquid crystals, with examples. (06 Marks)c. Define specific conductance and explain the estimation of hydrochloric acid in an given solution

conducto metrically using standard solution of Na OH. (06 Marks)d. What are instrumental methods of analysis? Indicate the advantages over conventional methods.


i) An example for natural polymer is

(04 Marks)

(04 Marks)

b. Explain free radical mechanism of addition polymerization taking ethylene as an example.

A) Resinii) Bakelite is

A) ThermoplasticC) Homo polymer

iii) Nylon is made up ofA) Adipic acidC) Both A and B

iv) Teflon is

A) Hydro carbon polymerC) Hetero polymer

A) Suspended impuritiesC) Bacteria

B) Plastic

ii) During the preparation of FAS solution in COD experiment dilute HzSO+ is added to FAS.Crystals toA) make the solution acidicC) prevent hydrolysis

B) To decrease PHD) None of these

iii) During the determination of total hardness of water by EDTA NH3 - NH4 Ct buffer is usedtoA) lncrease PHC) To maintain PH at 10

iv) In reverse osmosis, a semi permeable membrane is used to remove

b. Explain the determination of total hardness of water by EDTA method. (06 Marks)c. In a COD experiment 28.1 mt and 14.0 mt. of 0.05 M FAS solution were required for blank and

sample titration respectively. The volume of test sample used was 25m1.. Calculate the COD ofthe sample.

d. How is sulphate in water determined gravimetrically?

**r(r<*? nf ?

USN 06ccPt3l23

First/Second Semester B.E. Degree Examination, December 2Ol2Gomputer Goncepts and G Programming

Time: 3 hrs. Max. Marks:100Note: l. Answer any FIW full questions, choosing at least TWOfrom each part.

2. Answer ull objective Stpe questions only on OMR sheet page 5 of the answer booklet.3. Answer to objective type questions on sheets other than OMR will not be valued.

PART _ AI a. Choose your answer for the following :

i) Which of these is a computer for individual user?

iir)

b.

c.d.

0)(J

o(d!a

oC)!

?o

v?dU

3oo ll

troo.= .-I

xooYC]otr-.c a)

3z6=

oc)63Oo'oooc(o.8

26

-o(d

'CaOE

o-aoj^=

9Eao'6 tECgE!oJEi,atrboo=+otr>:oVLo

\r<-i ciooz

oo.

A) Network ServerC) Note Book Computer

2 a. Choose your answer for the following :

A group of eight bits is called a _

A) Flash MemoryC) Volatile Memory

b.

c.d.

3a.

ii) In a multi-button mouse, one button must be designated as The buttonA) First B) Left C) User

B) MinicomputerD) Mainframe Computer

B) Inkjet PrintD) Line Printer.

(04 Marks)

D) Primary

D) Viewable Area

(08 Marks)


(04 Marks)user and

D) Protocol

D) Web Engine.(04 Marks)(08 Marks)(04 Marks)

iii) A monitor's _ is measured in Hertz (H2)A) Refresh Rate B) Resolution, C) Size

iv) Which of these is a non-impact printer?A) Dotmatrix PrinterC) Band Printer

Explain the essential computer hardware.Explain briefly the various groups of keys in the standard keyboard layout. (05 Marks)Explain briefly the two main categories of printers. Give one example in each category.

A) Bit B) Byte C) Nibble

(03 Marks)

(04 Marks)

D) WordlengthD memory requires power to store data

ii) The _ standard promises to provide enoughA) ASCII B) RAM

lets you store more data on a magnetic diskA) Extraction B) Defragmentation C) Co

List the commonly used ports, in modern computers.Explain the various factors affecting processing speed.How is data organtzed on magnetic disk? Explain.

B) ROMD) Non volatile Memory

C) EBCDIC , D) Unicode

b.c.

d.

Choose your answer for the following :

D The program that controls the system'sapplication software is _A) Complier B) Assembler

ii) The acronym DOS stands forA) Distributed Operating SystemC) Driver Operating System

C) Operating System D) Interpreter

B) Disk Operating SystemD) Diskless Operating System

A is an agreed - upon format for transmitting data between two devices.A) Topology B) Protopology C) PrototypeA collection of related web pages is called aA) Web Book B) Web Site C) Web Directory

Write a note on windows XP operating system.Briefly explain the different network topologies.Define the terms "'W'W'W" and "E-mail".

c6?,iqflt:;LlBflSlqt


i) is the graphical representation of an algorithm.A) Algorithm B) Program C) Flowchart

ii)

iii)

have fixed meaning that cannot be changedA) Variable B) Constant C) Identifier

5a.


i) What is the output of the following code segmentint count: 5;

while(count-->0)pintf ("Yod", count);

A) 54321 B) Error

irr) An early exit from a loop can be accomplished by using _A) Switch B) Continue C) Break

Differentiate between WHILE and DO-WHILE statements.Explain the general syntax of FOR statement. Give example.Write a program to compute the sum of digits of a given integer.

2 of3

In C, which of the following is an invalid variable name?A) Const B) Keyword C) Row-total

iv) In flowchart, the symbol used to represent decision making isA) Rectangle B) Rhombus C) Circle D) Parallelogram.

Define algorithm. Draw a flow chart to find largest of three numbers. (05 Marks)Define variable. List the rules to form a valid variable name. Give example. (05 Marks)Explain with examples :

i) Assignment operators ii) Evaluation of expressions.

PART - BChoose your answer for the following :

i) The output is left justifled within the field with the use of

c) 432t

06ccPt3l23(04 Marks)

D) Diagram

Keyword

Tax- 1

(06 Marks)

(04 Marks)format flag

(04 Marks)

D) None ofthesestatement.

D) Noneofthese.(04 Marks)(06 Marks)(06 Marks)

D)

D)

b.

c.d.

b.

c.

d.

A)#0 B)- C) 0 D)#eii) What will be the value of z, when the following code segment is executed?

int x : 37,y : 42;z: (x > y)? x- y : y- x ;

A) -s B) 37 c)s D) 42iii) Multiway selection can be accomplished using statement

A) Switch B) Continue C) goto D) ifiv) The expression ! (x <: y) can be replaced by the expression

A) x:: y B)y<:x c)y>:x D)x>y.Explain formatted output statement with examples. Give its general syntax. (06 Marks)Write the general form of ?: operator. Explain with example. (05Marks)Write a program to determine whether a given number is multiple of 7 and print theappropriate message. (05 Marks)

D) 43210ii) Which of the following looping construct implements infinite loop?

A) for(i:l:I<10:i++; B) for (; ;)C) for(i:0, x:0;x<5; i++. x++) D)for(I:10; i>0;i+:2)

iil) Determine the number of times, the following loop will be executedx:5y: 50while (x <: y){I

x: y/x ;

\t

A) Infinite B) Continue C) Break

b.

c.d.

06ccPt3t23

(04 Marks)7a.

d.

8a.


i) Which of the following declaration is illegal in 'C'?A) Char city [5]: {'B'}C) float total: {0.5,6.54, 2.5\

B) int num[5] : {10,20}D) int size[3] : { 10, 20, 30, 40}

D) None of these

ii) What is the output of the following code segment?int m[ ] : {1, 2,3,4\int x, y: 0;for (x: 0; x < 4; x++)

y: y + m[x];printf ("ohd", y);

A) 10 B)6 c)eiii) What is the output of the following code?

int code t2lt3l : {{10, 20}, {30,40, 50}};printf ("%d", code t0]t2]);

A) Error B)0 c) 20iv) Usually, large arrays are initialized during

D) 40

b. Write a program to find sum and average of N integers using single - dimensional array.(05 Marks)

How do you declare and initialize atwo - dimensionalarray. Explain with example.(04 Marks)

Write a program to read two matrices A and B and print the following :

i)A+B iDA-B.


i) By default, is the return type of a C function

A) Compile timeC) Both A and B

A) floatC) char

' B) RuntimeD) None of these

B) intD) void

(07 Marks)

(04 Marks)


ii) The list of parameters in the function definition are called

iii) If "int mul(int x, int y)", is a function declaration, which of the following function callhas an error?

A) int z: mul(5, 10);C) mul(5, 2): l0

iv) A variable declared in a function is calledA) Actual VariableC) Global Variable

A) Formal ParametersC) Local Variables

List the advantages of using user - defined functions :

Write a note on category of functions.

B) Actual ParametersD) None of these

B) P: mul(3, 2) * +D) int Q : mul(5, 6)/2

B) Local VariableD) Formal Variable

b.

c.d. Write a function 'PRIME' that returns 1 if its argument is a prime number; otherwise it

return 0. Write main( ) function to read an integer from the keyboard and calls the functionPRIME passing the given integer as an argument. Print the appropriate message dependingon the value retumed by function PRIME.

OF "N*\A{Tffi*.L \6

ii)-(*

,/-"#,

CENTffi.#.LLl&ffiAm'f

&&&&J

(07 Marks)

USN 10ccP13/23

First/Second Semester B.E. Degree Examination, January 2013Gomputer Goncepts and C Programming


Note: 1. Answer FrvEfull questions choosing at least twofrom each part.2. Answer all objective type questions only in OMR sheet poge 5 of the Answer Booklet.

3. Answers to objective type questions on sheets other thun OMR will not be valued.

PART - AI a. Choose the correct answer :

i) Which of the following is not an input device.(04 Marks)

(A) plotter (B) scanner (C) key board (D) mouseii) Conversion of single program to M/C language is done by

(A) linker (B) compiler (C) editor (D) OSiii) Computer is controlled by _

(A) Hardware (B) Software

dQ

o!o.

q')

()!

.)X

_o-^tioo.=N

Y o.l

=c)

a-^aZ

#:l

o()+L

coc

/GG-

-?oA-f:\o-X

<);

6=3C,o til

L ajl

6.v;(H

ib0(J=o- :''i

xoo-

(r<*c\o)ozHog

iv) Computer converts data into(A) Information (B) Charts

b. Explain the basic structures of a computer, with a neat diagram.c. Explain the following input devices : i) Pen based input devicesd. Explain information processing cycle.

(C) Instructions

' (c) yP, o/P

(C) Assembly

(c) rx(C) Hexa

(C) Reminder

(D) Statement

(D) Software(06 Marks)

ii) Optical input devices. (06 Marks)(04 Marks)

(D) Parallel

(D) back bon

(D) www


(04 Marks)

D) Object oriented programming.

(D) H

(D) Binary

(D) Fractional part(04 Marks)(06 Marks)(06 Marks)

(04 Marks)


i) DOS is an example of _ interface.(A) Command line (B) Check box

(A) Machine (B) Proceduralii) The hexadecimal constant is preceded by :

(C) Graphicalii) Email is a system for exchanging messages through a

(A) client (B) program (C) Networkiii) Every webpage has a unique address, called a

(A) Hyperlink (B) URL (C) HrrPiv) In a _ n/w all devices are connected to a hub

(A) bus (B) star (C) ring (D) meshb. Define operating system. What are the functions of operating systems?c. Explain the following storage devices : i) Hard disk ii) Compact disk.d. Explain the characteristics of networks.


i) 'C' is what kind of language?

(A) oxiii) The number 025 is

(B) onumber.

(A) Decimal (B) Octalir) The operator % yields

(A) Quotient (B) Percentageb. Briefly explain how to create and run the program.c. Explain 5 - types of data with its range valve.d. Explain formatted input and output functions.


i) What is the size of character in bytes?(A) I (B) 2

ii) Puts is function(A) i/p (B) o/p

(c) 3 (D) 4

(C) Input output (D) Noneiii) The conversion specifier is used to represent string

(A) % d (B) %c (C) %f (D) %siv) Keyrvords are

(A) Identifier (B) Reserved words (C) Variable (D) Noneb. What do you mean by type conversion? Explain explicit type conversion with examples.c. Explain the following operators with examples : i) Conditional ii) Size of iii) Bitwise.


1 af )

10ccP13/23

d. Determinethe value of a each ofthe following logical expressions, wherea:5, b: 10 and c: -6.i) a>b&&a>c ii) b>15&&c<0 la>0 iii) (a12.0::0.0 &.8.bt2.0i:00)iic<0.0.

(03 Marks)

PART - BChoose the correct answer :

i) The default return type of a function is(04 Marks)

(A) int (B) float (C) charii) How many values retumed by functions by default

(A) ONE (B) rwo (C) rHREEiii) Which is not a variable storage class

(A) Automatic (B) Extern (C) Staticiv) Which keyword is used to declare external variable

(A) external (B) extern (C) auto externExplain the elements of user defined functions. (06 Marks)Write a function prime that returns 1, if its argument is a prime number and returns O. Otherwise. Using the

(c) 25

(c) 1s

(D) double

(D) FOUR

(D) Dynamic

(D) None

(D) None

(D) None

(D) None


(04 Marks)


(05 Marks)

(04 Marks)


b.c.

d.

c.

d.

8a.

b.U.

d.

same function, write a program to check whether the number is prime or not.d. Write a note on parameter passing techniques.


i) Multi way decision making using

number, assume day one is Monday.Write a program to find the given number is palindrome or not using while loop.Write a program to find square of a given number using for loop.(Note : Find square using successive addition method).

Choose the correct answer :

i) Array is an example of data types(A) Derived (B) Basic (C) User defined

(A) if (B) for (C) while (D) switchii) 5 > 3? printf ("hello": printf ("C") ;

(A) hello (B) C (C) hello C (D) Noneiii) Theresultof an expression2> 8 & &2 < 8 is

(A) True (B) False (C) 10 (D) 20iv) Size of (float) is

(A) 2 (B) 4 (c) 8 (D) 1

Explain switch structure with flowchart and write a program to display name a day in week for the given day

a.

ii) An array a [5] consists of number of elements.(A) 10 (B) s

iv) Which of the following is not a data structure(A) Linked list (B) Stack (C) Queue (D) Pointer

b. Explain how a 1 - Dimensional array can be declared and initialized, write a program to add all the 'n'elements of an array (06 Marks)Explain the following string handling functions, with examples : i) Strcat ii) Shcpy. (04 Marks)Write a C program to multiply A[M X N] and B[P X Q] matrices and stores the result in C marrix. (06 Marks)

Choose the correct answer : (04 Marks)i) Parallel computing is _ execution of instructions.

(A) Simultaneous (B) Serial (C) Accurate (D) Completeii) Which of the following is not a syrchronization construct?

(A) Single (B) Master (C) Section (D) Criticaliii) Howmanythreadswouldbecreatedfortheparallelexecutionoffor(x:0;x<10;x++){ }?(A) l0 (B) e (c) il (D) 0iv) Which of the following does not signifz the need of using threads?

iii) An array a [5] [3] consists of elements.(A) s (B) 3

(A) Enhanced performance(C) Hidden memory latency time

Explain the data handling in open MP.What is thread? Explain the need for threads.Write a note on environment variables of open MP.

2 of2

(B) Reduced processor idle time(D) Error - free computation.

USN 06ELN1s/25

First/Second Semester B.E. Degree Examinationo January z0l3Basic Electronics


Note: l. Answer any FIVE full questions, choosing at least twofrom eoch part.2. Answer all objective type questions only on OMR sheet poge 5 of the answer booklet.3. Answer to objective Upe questions on sheets other than OMR will not be valued.

PART _ AI a. Choose the correct answers lbr the following :

i) The Depletion layer in a pn junction containsA) ElectronC) Electrons and holes

, B) Holes

ii) The turn on voltage of a Si Diode is nearlyD) Ions

C) 1 voltA) 0.7 volts B) 0.3 volts D) 0.1 voltsiii) Once a Zener diode goes into break down the parameter which does not change much

isA) Current B) Resistance C) Voltage D) Capacitance

iv) If f Hz is the frequency of the input given to a fullwave rectifier, the output frequencywill beA) fHz B) 2f Hz C) 3f Hz D) 4f Hz

b. With a neat diagram, explain the process of formation of depletion layer in a pn junction.(04 Marks)

c. The incremental change in the voltage and the current is found to be 0.19V and 37 .6 mArespectively from the forward characteristics of the diode. Determine the ac resistance of thejunction. (04 Marks)

d. A single phase half wave rectifier supplies power to a 1 KfJ load. The inpue voltage is200 volt rms. Neglecting forward resistance of the diode, calculate:i) Va" ; iD V,n,. i iii) Ia. ; iv) Ripple voltage (rms calue). (08 Marks)

2 a. Choose the correct answers for the following: (04 Marks)i) The current amplification factor o6s of a transistor is given by

A) ,,1, ,rr/, ,rr,/, D)r,/,/

ii) In the following relationships between cr and B, one of the expression is wrong

a)o()(g

oC)!

-o? o

6e

troa

:: AOYOoJtr

-C(I)

o2

a=

oc)

o0i

>e-6

E(B

-?AJoj=5::^Xtro.o..o_,i.eSJEto'a tE

!o5.e>'hbo-troO

a. ;jtr>=oVLo

U<-No

Z

L

(04 Marks)

A) B=* B).,=+' C) c[= B

l+0D)1-cr= 1

1+Fiii) For a transistor to function as a normal amplifier

A) EB junction is reverse biased and CB junction is forward biased.B) EB junction is forward biased and CB junction is forward biased.C) CB junction is reverse biased and EB junction is reverse biased.D) CB junction is reverse biased and EB junction is forward biased.

86. of a transistor is

A) Equal to cr,6.

C) Greater then cra.

B) Less than o6.D) None of the above

#9iv)

1n€A

c.

d.

3a.

06ELN15/2s

b. Draw the symbols of a pnp and an npn transistors. Which of the transistor current is alwaysthe largest? Which is always the smallest? Which two currents are relatively close inmagnitude? (05 Marks)Explain the working of a transistor amplifier in the CE configuration. Draw its outputcharacteristics and mark the three regions of operation on the characteristics. (06 Marks)Determine Fo., IE and cr4. for a transistor where Is : 50pA and Ig : 5mA. Neglect I6s6.

(05 Marks)

Choose the correct answers for the following: (04 Marks)i) The best location of the Q-point for a transistor is

A) At the bottom of the dc load line B) At the top of dc load line

b.

c.

C) At the centre of the dc load lineii) The dc load line of a transistor circuit

A) has a positive slopeB) does not contain the Q-point

D) Outside the dc load line

C) has a negative slopeD) gives graphic relationship between Ic and Ie

iii) The early effect in a bipolar junction transistor is caused byA) Fast turn on B) Fast turn offC) Large collector base reverse bias D) Large emitter base forward bias

iv) A BJT is said to be in saturation region ifA) both junctions are reverse biasedB) EB junction is reverse biased and CB junction is forward biasedC) EB junction is forward biased and CB junction is reverse biasedD) both junctions are forward biased

Define bearing of a transistor. Explain with a neat circuit diagram the operation of acollector to base bias circuit. What is the advantage of this circuit over a fixed bias circuit?

(08 Marks)Given that I6q : 2mA and V66q : 10V. Determine R1 and Rc for the network shown.VeE : 0.7V. (08 Marks)

l--V"roFe.

;Fig.Q.3(c)


D The latching current in a SCRA) is less than holding currentC) is equal to the holding current

B) is greater than holding currentD) None of the above

(04 Marks)

D) UJT

D) All the above

D) FET

ii) Which of the device mentioned acts like a diode and two resistorsA) SCR

iii) A FET consists ofA) Source

B) TRIAC

B) Drain

C) DIAC

C) Gate

C) SCR

iv) Which of the following is a unipolar deviceA) Diode B) BJT

2of4

c.

06ELN15/25

Draw the symbol and the equivalent circuit of UJT. Using the equivalent circuit explain theworking of UJT and draw its characteristics marking the various regions on it. (08 Marks)Explain the working of a SCR using two transistor model and obtain the expression for theanode current.

PART _ B


i) The gain of a cascaded amplifier isA) Sum of the voltage gains of all the stagesB) difference of the voltage gains of all stagesC) Products of the voltage gains of all stagesD) None of the above

(08 Marks)

(04 Nlarks)

C) 100 Hz D) 2651kHzcurve of a RC coupled amplifier clearly


and L2 : 2mll and a variable capacitor.frequency of oscillation is varied between

(06 Marks)

(04 Marks)

D) AX the above

D) -10-3

ii) The frequency of oscillations in an oscillator is given

B) 2nLC C) 2n"lLC

iil) An oscillator isA) like an alternator B) an amplifierC) an amplifier with positive feedback D) a rectifier

iv) For a Colpilt's oscillator Cr : 0.01 pF, Cz : 0.001prF and L : 15pH. Its operatingfrequency isA) l362kHz B) 1500 kHz

A)12nLC

1

nTycD)

b. Draw and explain a typical frequency responseindicate the various regions in it.

c. List out the advantages ofnegative feed back.d. A Hartley oscillator is designed with Lr : 20pH

Determine the range of capacitance values, if the1 MHz to 2.5 MHz. Neglect mutual inductance.

a. Choose the correct answers for the following :

D An Op-AmpA) amplifies the sum of the two signals applied across its terminalsB) amplifies the product of the two signals applied across its terminalsC) amplifies the difference of the two signals applied across its terminalsD) None ofthe above

ii) An ideal Op-Amp hasA) infinite A" B) infinite R1 C) zero R.

iii) An inverting amplifier has Rp:2Mf) and R1 :2KO.Its scale factor isc) 1o-3

B) lA,l* lA"l

D) lA,l-la"l

ir) CMRR of an Op-Amp is given bya; la,lle"l

c) E.i' lA.l

A) 1000 B) -1000

b. Draw the equivalent circuit of an Op-Amp. (04 Marks)c' Draw the circuit of an Op-Amp as a non-inverting summer and device an expression for- output voltage. (06 Marks)d. Draw the basic structure of a cathode ray tube and explain its working. (06 Marks)

rss

3 of 4

06ELN15/2s

7 a. Choose the correct answers for the following : (04 Marks)i) The main purpose of modulation is to

A) Combine two waves of different frequenciesB) achieve wave shaping of the carrier waveC) transmit low frequency information over long distances efficientlyD) produce side bands

ii) In amplitude modulationA) Carrier frequency is changedC) Three side bands are produced

iii) The binary addition of 1+1+1 givesA) 111 B) 10

iv) The binary equivalent of (A)ro isA) 1010 B) 1011 C) 1100 D) 1110

b. What are the basic components of a communication system? Draw and explain the blockdiagram of a typical communication system. (06 Marks)

c. If the radiated power of an AM transmittei is 10kW, determine the power in the carrier for amodulation index of 0.6. (04 Marks)

d. Perform the following subtraction using 2's complement i) 78-65; ii) 708-648. (06 Marks)


i) The output of a2 input OR gate is zero only whenA) both inputs are zeroC) both inputs are one

B) Carrier amplitude is changedD) Fidelity is improved

c) 110 D) 11

B) either input is oneD) either input is zero

D)A

ii) A NOR gate is ON only when all its inputs areA) ON B) Positive C) High D) Zero

iil) ABCD + ABD is equal to

A) ABCir) A (A + B) is equal to

A)B

B) ABC C) ABD D) ABD

B) AB c) ABb. Determine the output of the logic circuit shown in the figure

Fig.Q.8(b)Simplify the following :

i) ag+A+ABii) AB+A(B+C)+B(B+C)Reduce the Boolean expression

Y=aeCD+BCD+BCD+geland implement it using logic gates.

c.

d.

(04 Marks)

(04 Marks)

(06 Marks)

,(rrrrrr*

4of4

(06 Marks)

USN 1oELN15/2s

First/Second Semester B.E. Degree Examination, January 2013Basic Electronics

Time: 3 hrs.

Note: 1. Answer FIVE full questions choosing at least two from each part.2. Answer all objective lype questions only in OMR sheet page 5 of the Answer Booklet.

3. Answers to objective type questions on sheets other than OMR wilt not be valued.

Max. Marks:100

PART - AI a. Choose the correct answer : (04 Marks)

i) A device which allows the current flow in one direction but does not allow it in the opposite direction is called(A) Transistor (B) Filter (C) Regulator (D) Rectifier.

ii) The capacitance of a forward biased p - n function is called

C)ooi:o.

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b9potr-c a)

6=

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u0tr

26

-a 6i'Eao;)u

o.!()_i;od=lo4!=

=-9O,=>,f-o0o=o. :jtr>Xo5L

(r<* C'l

oo

o

(A) Diftusion (B) Conventional (C) Driftiii) The zener power dissipation is given by the product of

(A) VR, rz (B) vF , Iz 1C1 Vr.t,iv) The maximum efficiency of full wave rectifier is

(A) 40.6% (B) 60.4% (c) 78.s%b. Explain the forward and reverse characteristics for a Ge

c. With a circuit diagram. explain the working of a full wave rectifier. Draw relevant waveforms.d. A 9V retbrence source is to be designed using a zener diode and a resistor connected in series to a 30V

suitable components and calculate the circuit current when the supply voltage drops to 27V. Assume


i) A transistor is cutoff when(A) Both emitter and coll..to. furrction reverse biased(B) The emitter function is reversed biased but the collector function is forward biased.(C) Both emitter and collector function are forward biased.(D) The emitter function is forward biased but the collector function is reversed biased.

ii) Ifu :0.95, than the value ofp ofthe transistor is(A) 0.0s (B) 19 (c) r0o

iii) The output characteristics of a CE configuration is a graph between _.(A) VBE. IB (B) VBE, VcE (c) vcr, Iciv) The Q - point is also known as

(A) Open point (B) Operating point (C) D.C. pointb. Explain the working of a curent amplification using transistor.c. Explain with the help ofcircuit diagram the working ofinput and output characteristics oftransistor in

(D) Transition

(D) None of these

(D) 81.2%.

- diode. with a

(D) 120

(D) Vse,

(D) A.C

neat figure.(05 Marks)(06 Marks)

supply. Selectly1 : 200mA.

(05 Marks)

(04 Marks)

d. For a cefiain transistor circuit, 16. : l2.42mAand Is :200pA. find i) IE ii) o and p'of transistor.

a. Choose the correct answer:

(c) PNPN (D) PNN

i) In the biasing circuit, the one which gives most stable operating point.(A) Base bias (B) Collector to base bias (C) Voltage divider bias

ii) Stability factor S for base bias circuit is(A) s:l+p (B) S:r_p (c) s:l(l_p) (D) s:t/(l+p;

iii) Diode can be used for compensation of _ changes in voltage divider bias circuit(A) VeE (B) Vce (C) Vcc (D) Ve

iv) In emitter bias circuit _ is connected between emitter and ground.(A) Inductor (B) Capacitor (C) Resistor (D) Diode

b. With a circuit diagram, explain the operation of collector - to base bias circuit. (08 Marks)c. The voltage divider bias circuit has V66- l5V , R1 = 6.8ke . &:3.3k0 . Rc:900(2 , RE:900e and hes :50,

VBE - 0.7V. Find the levels of Vs, IB. Ic. VcE and V6. Draw the DC load line and mark the Q point on that. (08 Marks)a. Choose the correct answer :

i) SCR is a _ devicc(A) NPN (B) PNP

ii) SCR crow bar circuit is used for protection against(A) under voltage (B; over current (C) under current

(05 Marks)CB configuration.


(04 Marks)

(D; None of these.

(04 Marks)

(D) over voltage.

(D) must be negative

(D) None of these(06 Marks)(06 Marks)(04 Marks)

iii) The intrinsic stand - off ration of UJT(A) musl be less than unity tB) ,rrt be gr.ut.r than unit; (C) musl be zero

iv) FE,T is a _controlled device.(A) Voltage (B) Cunent (C) power

b. Explain the working of two transistor model of SCR.c. Explain with a neat figure the construction ofa p - channel JFET.d. Give the equivalent circuit of UJT.

PART- B

(B) even number of inputs is 1

(D) odd number of inputs is 1.

(C) Both NOR & NAND

(C) cany l, sum 0

lOELN15/25

(04 Marks)

(D) Unity gain

(D) Apl > . shift: l80o

(D) the transistor

(D) mid band(06 Marks)(05 Marks)

(04 Marks)

(D) *

(D) V/pS

(D) unity

(D) train of impulses(05 Marks)(06 Marks)

(05 Marks)

(04 Marks)

(D) < l.

(D) Pr - Pc ( l+(m 2/2))

(D) m2Ec2/4

(D) 6 digits.(06 Marks)(06 Marks)(04 Marks)

(04 Marks)

(D) NOT. AND, OR

(D) carry l. sum I


i) In an oscillator we use feedback.

b.

d.

(A) Positive (B) Negative (C) Neitherii) The two Barkhausen conditions to be satisfied by oscillator are

(A) lApl < l. shift:00 (B) lApl > 1. shift:00 (c) BpE l. shift:900iii) In RC coupled amplifier the d.c. component is blocked by _

(A) load resistance R1 (B) coupling capacitor, Cc (C) RB

ir) fr(fL) and fdffl are known as frequencies

tA) half (B) halfpower (C) decibelWith the help of circuit diagram, explain the working of a RC coupled single state CE amplifier.List the advantages ofnegative feedback.

, (C) pV/V

Calculate the value of an inductor to be used in Colpitt's oscillator to generate a frequency of I 0MHz. Assume the valuesof Cr : 100 pf and Cz:50 pf. (05 Marks)


i) The ideal value of CMRR is(A) eodB (B) 2 x lOs (c) 0

ii) The PSRR is generally measured in _(A) dB (B) mV/V

iii) The gain of voltage follower is _(A) zero (B) infinite (C) negative

iv) If we apply a square waveform to a differentiator, then we get _at the output(A) cosine wave (B) ramp (C) sine wave

b. Give the ideal op-amp characteristics.

d.

With the help of circuit diagram, explain the working of an op-amp used as integrator.Design an adder circuit using op - amp to obtain an output expression V0 : -(0. 1Vr + 0.5V2 + 20Vr), where V1, V2 and V3are the inputs. Select Rg: 10kQ


i) Over modulation exists when modulation index is(A) I (B) o (c) >l

ii) The relation between carrier power and total power in an AM wave is(A) Pc:Pr(l+(m'?l4)) (B) Pc:Pr 1+1m'1211 (C) pr:p.tr+tm,l+))

iii) The amplitude of both the side bands in an AM wave is(A) Ec2l2m (B) m2Ec/2 61 me6l2

iv) Hexadecimal and octal numbering systems are similar for the first(A) 9 digits (B) 8 digits (C) 7 digits

b. Explain the need lbr modulation.c. With the help of block diagram, explain the working of super heterodyre receiver.d. Perform the following decimal subtraction using 9's complement method : i) 49 -24' ii) 321 - 57g.

a. Choose the correct answer:i) For EX - NOR gate the output is I if

(A) even number of inputs is 0(C) odd number of inputs is 0

ii) Which of these are universal gates?(A) only NOR (B) only NANS

iii) Theresultofbinaryaddition I + I + I is_(A) carry 0. sum 0 (B) cany 0, sum I

iv) Ahalfadderhas inputsand outputs.(A) l, I (B) t,2 (C) 2, I

b. State Define Morgan's theorems.

c. Simplif thefollowingBooleanexpressions: i) Y:AB + AC + BCiii) Y:c(B+c)(A+B+c).

d. What is futl adder? Give its truth - table. lmplement the full adder using logic gates.

,(r<***

(D) 2,2(04 N{arks)

ii) Y:(A+B+a)(A+g+C)(06 Marks)(06 Marks)

2 of2

10cw18/28

Question Paper Version : CUSN

First/Second Semester B.E Degree Examination, January 2013

Time:2 hrs.]

Environmental Studies(coMMoN TO ALL BRANCHES)

INSTRUCTIONS TO THE CANDIDATES[Max. Marks: 50

I. Answer all the fifty questions, each question carries ONE mark.2. Use only Black ball point pen for writing / darkening the circles.

3. For each question, after selecting your answer, darken the appropriate circle corresponding to thesame question number on the OMR sheet

4. Darkening two circles for the same question makes the answer invalid.5. Damaging/overwriting, using whiteners on the OMR sheets are strictly prohibited.

l. In the world's population, India accounts fbra) ljY" b) s%

2-

3.

4.

5.

6.

1

8.

9.

World Environmental Day is celebrated ona) 5'h June b1 I I'h June

Excess fluorides in drinking water is likely to cause

c) 25%

c) l2s January

c) taste and odour

c) Vandana Shiva

c)03+C)2

c) multidirectional

c) Kamataka

c) West Bengal

c) fishiculture

c) Penincr,lar Inrlio

c) Green Revolution

c) tidal energy

c) ethane

c) irregular

c) biogeochemical cycle

rr)

6c) He d) Oz \\.

d) 16%

d) 8th September

d) intestinal irritation

d) Suresh Heblikar

d) PAN + CO,

d) none ofthese

d) All of these

d) All of these

d) horticulture

d\ Grriarar

d) Silent Valley Project

d) all ofthese

d) methane

d) none ofthese

d) geochemical cycle

a) blue babies b) flurosis

The Ieader of Chipko movement isa) Sunderlal Bahuguna b) Medha Patkar

E.l.A. can be expanded as

a) Environment and Industrial Actc) Environment Impact Assessment

Which of the following is not a biodegradable pollutant?a) Ptastic

Minamata disease is caused bya) cadmium b) strontium

BOD stands fora) Biochemical Oxygen Demandc) Biogeochemical Oxygen Demand

Gleenhouse eflect is caused by excess ofa) CO: b) H,

10. Photochemical smog is caused bya) PAN + O. b) PAN + O1

I I. Enerry flow in any ecosystem is alwaysa) bidirectional b) unidirectional

12. Sundarbans is the name of place in

b) Environment and Impact Activitiesd) Environmentally Important Activity

b) Skins ofvegetables and fiuits c) Dry leaves d) Paper

c)mercury oiu.*iryffS-Q-)b) Biological oxygen Demand l!+ ^- .*"" - "-nid) None of these-- ll'if Ci';;: I

:'-.1- i

13.

14.

15.

16.

17.

18.

a) Assam

Mangrove forests are seen ina) Mumbai

Rearing fish is calleda) pisciculture

a) wind energy

Biogas is made up mostly ofa) hydrogen

b) West Bengal

b) Nicobar Islands

b) sericulture

b) solar energy

b) carbon dioxide

Western Ghats are not located ina) North-E,ast India b) Maharastra

Medha Patkar is famous fora) Chipko Movement b) Narmada Bachao Andolan

Examples of renewable resources are

19. Pyramid of numbers in a pond ecosystem is alwaysa) inverted b) erect

20. Cycling of materials in the biosphere is calleda) biochemical cycle b) biophysical cycle

10clv18/2822. Salim Ali was an expeft in

a) agricultural sciences b) rainwater harvesting c) ornithology d) environmental law23. Which of the following diseases is not spread by water?

a) diarrhea b) chickenpox c) cholera d) dysentery

24. D.D.T. is aa) fungicide b) pesticide c) ferrilizer d) disinlectant

25- Which of the following waste material is degradable?a) plastic b) metal c) glass d) paper

26. Environmental Education is targeted toa) general public b) professional social groups c) technicians and scientists d) all ofthese

27. Bhopal gas tragedy caused due to leakage ofa) Methyl Iso cyanate (MIC) b) Suplhur dioxide c) Mustard gas d) Methane

28. Which state is having highest women literacy rate in India?a) Kamataka b) Punjab c) Rajasthan d) Kerala

29. The virus that causes AIDS isa) HIV b) TMV c) HMV d) none of these

30. Kalahazar is spread bya) tape worms b) rats c) mosquitoes d) sand flies

31. Which of the following is not a greenhouse gas?a) CO: b) CH4 c) CFC d) H,

32. Ionizing radiations ofecological importance area) cr - rays b) B - rays c) y - rays d) all ofthese

33. The proportion of methane in biogas isa) 20 to 30Yo b) l0 to 30% c) 60 to 70o/o d) g0 to 90%

34. Which is not a natural disaster?a) Cyclone b) Nuclear explosion c) Earthquake d) Volcano

35. Landslides are caused bya) earthquakes b) dam building c) mining d) all of these

36. Radiation is a health hazard because it leads toa) tlphoid b) cancer c) colour blindness d) pneumonia

37. Which of these gases causes air pollution?a) Nitrogen b) Hydrogen c) water vapour d) Carbon monoxide

38. Kitchen Wastes containa) non-biodegradable pollutants b) biodegradable pollutants c) radioactive pollutants d) none ofthese

39. Water pollution is caused bya) sewage b) industrial effluents c) discharge from forms d) all ofthese

40. D.D.T. pollutes ,

a) air b) water c) soil d) all ofthese41. Pyramid of enerry is always

a) inverted b) erect c) rectangular d) none ofthese42. Herbivores are

a) primary producers b) consumers c) decomposers d) all ofthese43. The sequence oforganisms in a food chain is

a) consumer -+ producer -) decomposer b) decomposer -+ consumer -+ producerc) producer -+ decomposer -) consumer d) producer -+ consumer -+ decomposer

44. Which of the following is a top camivore?a) Tiger b) Crocodile c) Hawk d) All of these

45. One method of Nitrogen fixation in nature is bya) thunder b) rain c) lightning d) storm

46. Coal is aa) renewable source ofenerg, b) inexhaustible source ofenergyc) non-renewable source ofenerry d) none ofthese

47. Which of the following is a non-polluting source of enerry?a) Coal b) Petroleum c) Natural gas d) Solarenergy

48. Deforestation is majorly @used bya) mining b) overgrazing c) dam building d) all of these

49. Major dams may causea) earthquakes b) hurricanes c) storms d) cyclones

50. Ma,ximum usage of water is in the filed of

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