USN

Time: 3 hrs.Note: Answer FIVE full questions, selecting

at least TWO questions from each part.

MODULE_ II a' ff y% +y Y^ = 2x prove that

(*' -r)r"., + (zn + 1)^y,*, * (r' - -'b, = o

b. Find the pedal equation for the curve

r' = a' sin m0 + b' cos m0c' Derive an expression to find radius of curvature in cartesian form.

14MAT11

Max. Marks:100

(07 Marks)

(06 Marks)

(07 Marks)

(07 Marks)(06 Marks)(07 Marks)

(07 Marks)

(06 Marks)

(07 Marks)

(07 Marks)

(06 Marks)

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(07 Marks)

First Semester B.E. Degree Examination, June/July 2015

Enginee ring Mathem atics - I

e*sinx-x-x'

d(JC)

oI

3ey-

Ar)-*llc@'=+.= c!

g;iotr-coc'E9'

8za=

bU

botr

-o>!,66-

-.'B5vo.6.tro,o-aa=3iiaiE

L (.)

6.YOf, Ocao

*Otr>YL

rJ{-i c-i

ooz

!ao.

ORFind the nth derivative of sin2x cos'*2a.

b.c.

4 a. Evaluate lim {r0t

r[ l-.,,

Show that the curves r = a( l+cos 0) and r: b (l-cosO) int.rs..t at right angles.Find the radius of curvature when x = a log (sect + tant). y = a sect.

MODULE- II3 a. Using Maclaurin's series expand tan x upto the term containing x5.

b. Show that x gI* uQ = 2u los u where losu =

*'+ y'dx ' Ay " ,:

' e 3x+4yc. Find the extreme values of xo + yn *'Z(x - y)'

OR

x'+xtog(t-x)

5a.

tr"' b'

b. Ifu=x logxy where ^'+y'+3xy=1

Find Q

c. If u=YZ. v=xz. w=xY.findal;u.v'Y).x y z O(x,y,z)

MODULE_ IIIFind div Fand Curl Fwhere-)/\F- grad (*'+ y' +z' -3xyz)

Using differentiation under integral sign,l. uo

-1Evaluare [F a^ (" > 0)Jn log x

l-,1-rHencefind l^ 'dx

{ logx

c. Trace the curve y'(u - x ) = xt, a > 0'use general rules.

OR

1^f ,)

b. Solve , ^y(t

* ^ ,')t =,

9a.

l0 a.

b.

c. Reduce the quadratic form 2xl +2xl'+Zxl +2xrxrinto canonical form by orthogonal

14MAT11

(07 Marks)

(06 Marks)

(07 Marks)

(07 Marks)

(06 Marks)

(07 Marks)

(06 Marks)

(07 Marks)

(07 Marks)

(06 Marks)

(07 Marks)

(07 Marks)

(06 Marks)

a. If ?=xi+yj+zk and r=l?l ,nr.rprovethat Vr'=nrn-2 ?lb. Find the constants a, b, c such that F=(* +y+ar\r+(bx+ Zl-ij+(x+ cy+22)kis

irrotational. Also find $ such that F = V0c' Using differentiation under integral sign,

IEvaluate I e-"* t'n

^ d^J,.xtl

,r@/2

Obtain reduction formula for J cosn x dx0

Solve : (l + 2xy cos x' - zxy)dx * (ri, x' - x')0, = o

A body originally at 80"C cools down to 60"C in 20 minutes, the temperature of the air being40'C. What will be temperature of the body after 40 minutes from the original ? el Marks)

OR:'..: )1.

a.

b.

c.

8 a. Evaluate I*,0

c.x' v'Find the orthogonal trajectories of the family of confocal conics , +

;{; = t

where ), is parameter.:

. ;i: MODULE- VSolve by Gauss eliminatioh method5x, +x2+x3 *xo=4, xr+7xr+x3+xq=I2, xr*xr+6xr*xo =-J,xr+x2+xr+4xo--6

Diagonalize rhe matrix o =l_t_), lrlFind the dominant eigen value and the corresponding eigen vector of the matrix

Io -2 21rlA=l-2 3 -11rlL2 -r 3_l

by power method taking the initial eigen vector (1, 1, 1)1

ORSolve by L U decomposition methodx+5y *z=14, 2x+y+32=14, 3x+y+42=17Show thatthe transformation y, -2*,-2x.,-x, yz=4xt +5x, +3x,,

Y: = Xr -xz- x, is regular and find the inverse transformation.

b.

c.

{<*r<**

Zax-x2

transformation. (07 Marks)

Second Semester B.E. Degree Examination, June/Jul y 2lir5Engineering Mathematics - ll

Time: 3 hrs. Max. Marks:100

Note: Answer uny FIVE full questions, selecting ONE full questionfrom eaeh part.

PART - A

USN

3a.

b.

c.

4a.

b.

c.

I4I/IAT2I

(06 Marks)

(07 Marks)(07 Marks)

(06 Marks)(07 Marks)(07 Marks)

(06 Marks)

(07 Marks)

(07 Marks)

(06 Marks)

(07 Marks)

(07 Marks)

(06 Marks)

(07 Marks)

(07 Marks)

ooo!a

a)

o!

lloDIl-

dU-o ,,

bo-€.= c..l(dsnootsoogl

-.Cc)!Etrtro>8zAGq=UE

c0tr!x6-

'od

^XFTo .-:d,a

3o9V!o

>r (Eoo-aao

*oEi:>

L.,) <. j,c.itl

o

z

o.

a. Sorve 4*-4* -1,-J.+n++36y = s.dx* dx' dx' dx

b. Solve #. r# + I 1:: -t 6y -e* + 1 using inverse differential operator method.

rined coefficients.

2 a. Solve (4Do - 8D3 - 7D2 + l1D + 6)y: 0.

b. Solve (D2 + +)y : *' + e-' using inverse differential operator method.c. Solve (D2 - 2D + 2)y : e'tan x using method of variation of parameters.

Solve 9l-r* * y = o. 99 -z*-5v = o.dt'dt

Solve ^'gi + +*9I * 2y = s*.dx- dx

Solve y:2px+ y'pt by solving for x.

Solve (l +x)'z#.(l + x)9+ y = 2sin(log(1 + x)) .

Solve q-q - t - Y by solving forP.dxdyyx

Solve (p* - y) (py + x): a'p by reducing to Clairaut's form.

PART - C5 a. From the function (^' + y2, Z - xy)-: 0 fo11n the partial differential equation.

b. Derive one dimensional wave equation u, + =.' ?'Y .a( - axr'

I i xvdvdxtt0 *:

by changing the order of integration.c. Evaluate

I of2

6a.

b.

c.

Derive one dimensional heat equation

I z x+z

Evaluate I I I(x+y +z)dydxdz.-l 0 x-z

a2

Solve : : =sinxsiny for which0x0y

multiole of 1.,2

4 = -2siny when

^ ^:)OtJ , d-u= C---=A Ax'

14MAT21

when y is an odd

(06 Marks)

(07 Marks)

.*;i;, (o7 Marks)

(06 Marks)

(07 Marks)

(07 Marks)

and z: 0(06 Marks)

(07 Marks)

(07 Marks)

(07 Marks)

(07 Marks)

find L{(t)}.

(06 Marks)

(07 Marks)

t, yl1o; : -2.

(07 Marks)

PART - E

x:0 and u:0

0<t<1l<t<2

8 a. Find the volume of the solidboundedbytheplanes x:0, y:0, x *y-t z:using triple integral.

a. Find the area between the parabolas y2 : 4ax and x2 : 4ay using double integral.I,

b. Evaluate t+ using beta and gamma functions.

'n Jl- *o

c. Express the vector Zi-2xj + yk in cylindrical coordinates.

r2Evaluate j'mA de x [ + using beta and gamma tuncrions.

o t r/sinO

Express the vector field 2yi - zj + 3ik in spherical polar coordinate system.

b.

c.

9 a. Find the Laplace transforrn of te4r sin3t and tu' ,t-u' . (06 Marks)t

b. Express (t) in terms of unit step function and find its Laplace transform given that

c.

t0 a. A periodic function f(t) with period 2 is defined by

,F*>Ft{<

2 of2

Find L ,{----]-[(s+t)(s'+9) )

urins convolution theorem.

I t.f(t) = il1- +

Lt.'

b. Find r{--r- 1 / r \l1.3s" +au* +loe[; -t)]

c. Solve using Laplace transform method #.2# + y = re-' with y(0) :

PART - D

USN lOMAT2I

Second Semester B.E. Degree Examination, June/July 2015Engineering Mathematics - ll

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

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

PART - AL a. Choose the correct answers for the following :

i) The general solution for the equation, r'p' + 3xyp + 2y' = 0 is,

A) (x-y-CXx'+y'-C)=0C) (xy - CX*'y - C) = 0

ii) The given differential equation is solvable for y, if it is possible to express y in terms of,

q,oQ

g

a

!0)C6C,}

?a

.yl

oo ll

c@.=Nd$tr.6?p

?a

6=

bU(oob0<€(B!:-v26

'od46J'iaOtq-

d_9FO-5cdoj

o=tc)atE

k6)tto.r}'+ibovE OI)

o=*oa"Y!

\J<:-o,oz".6&t+,

a

B) (V-x-C)(x-y'*C)=0D) (V-x-C)(xzy+C)=0

(04 Marks)

D) None of these

D) x(l+e-^)+e* +1

D) x=py+sin-'p(04 Marks)

(06 Marks)

(06 Marks)

(04 Marks)is,

iii) The singular solution of the equation, (y - pxXp - 1) :$ ii,A) y(l+e.)+e^ B) x(l+e')+ev C) V(l+e-*)+x

iv) Clairuts equation of sinpxcosy = cospxsiny + p is,

A) y=px-sin-rp B) x=py-cos-'p C) y=xp+cos-'pp2 +2pycotx = y2.

xt+ptx=1rp.y = 2px - y'p'. Take x : 2r*:Y-= y2.

2 a. Choose the correct answers for the following :

i) The complimentary function for the differential equation, y' - 6y' + 25y = e

b. Solve :

c. Solve :

d. Solve :

A) e" (C, cos3x + C, sin3x)

C) e"(C, cos4x + C, sin4x)

41 xcos2x ,., cos2x'48

, ,. iv) The solution of the differential equation,

) A) C,e-'+C,e:'*i.-'-

C) Cre-- + C2e-2', *1a-t-'2r2

b. Solve: Y * 4y = 2-* .

dxrlc. Solve , 14 + 8y = x'e-'*

dx'

B) e-" (C, cos3x + C, sin3x)

D) e-3.1C, cos4x + C, sin4x)

ii) The displacement in the simple harmonic d? = -u,* ir,

A) C, eosprt - C, sinpt B) C, cosprt + C, sinptC) C,cospt+Czsinpt D) cospt+sinpt

iii) The particular integral of (D2 + 4)y = cos2x is,

sin 2xc) _'8y' +3y' +2y - e-3* is,

,) fjPt

B) C,e^ + C.e-2* +le-r*"2D) None of these

(04 Marks)

(06 Marks)

(06 Marks)d. Solve the system: !I + Z* - 3y = 51, 9- r* +2y - 2e2' .dt dt1of 4

3 a. Choose the correct answers for the following :

i) The Wronskian of the differential equation, (D + Z)'z y = sec2x is,

A) e-'^ B)2 c) eo*

1OMAT21

(04 Marks)

D) e-*'

(04 Marks)

(06 Marks)

o; f,[vr1t;functions f and g from the

(04 Marks)

a_

0and " =ow,(06 Marks)

(06 Marks)

i, The complimentary function of the differential equation, *ty" - xy'+ y = logx is,

A) C,x+Crxlogx B) C,x +Crxz C) C,logx+Crx2 D) C,x2 +Crxlogx..iii) The homogeneous linear differential equation whose auxillary equation has rooto,i

l,-1 is, ,,1,.,'"A) x'yr-xy,*y=0 B)*tyr*xy, -y=Q 1,9'

C) x'yr*xy,*y=0 D)ttyr-xyr-y=0 *;tiv) To find the series solution for the equation, 4(l - x)y, + 3y, + 2y = 0, fre assume the

series solution as,

A) y-ia.*,*'*' g)y-iu**.***' c)y=iu,*' ""'' D)r=iu,***'r=0 r=0 r=0 r=0

b. By the method of variation of parameters, solve #. , = I *};

Solve : (2x +3)'g +6Qx+:lg * 6y = log(2x + 3) .

dx' 'dx

12v dvObtain the Frobenius-type series solution for the equation, x- + "r - y = 0 . (06 Marks)' dx' dx

Choose the correct answers for the following r , ,

(04 Marks)

x- v-i) The partialdifferential equation obtained fuom,2z=lt+l" is,

A) 2 =xp + yq 81 i"::i'xp + yq C) x = xp + yq D) 2z =xp +yqi0 The partial differential oquation obtained from, z = e-vQ(x - y) is,

A) px tg=mz B) p+q+mz=0 C) xp+qy:mz D) p+ g=mzA?z).iii) General solution of the equation

- = x'y is,dx*

32 12A) *I +f(y)+s(x) B)*I +f(y)66

1)/-,\ x YL,

- D) None of these

6

iv) To solve u^* -2u* *u, = 0 by the method of separation of variables, the trial solutionis,

e) x(x)r(t) c) x(x)./r(t)

c.

d.

4a.

A) x(x)T(x)b. Form a partial differential equation by eliminating the arbitrary

relation, z = f(y + 2x) +g(y - 3x).c. Solve the equation:

^,d'7.1+9x'y' = cos(2x - y) by direct integration, given that z : 0 when y :6xOv

when x: 0.

Solve : (x' - yz)p +(y' - r^)q =22 -xyd.

2of4

A)2

iii) lx'e-o*'dx ='I

0

A) 21

A) 6t7

B) 32

l1 -B) aJn

46

B),. -"7'16

c) 23

C) l',f55

lOMAT2T

(04 Marks)

D) 4ts

D) 3t2

D) U32

16 r--!r105

(04 Marks)

(06 Marks)

(06 Marks)

(04 Marks)

-6t7continuously

PART _ Bfollowing:5 a. Choose the correct answers for the

i) The value of jfrvaxa* ir,

A) gt2 ro

B)314tt2rl) J{J*t"'a*ayaz =

-B)3

c) 2t3

c)1

c) 7 t6

iv) r(-tlz)= _A) IG

32D)

b. Evaluate ii+* by changing the order of integratigur,.:'o '^ {x' + Y'

r-a 1c--\Evaluate I J v,J---, . v ayax by transforming to polar coordinates.

lzlr.,i,.Prove that f -Ldu l-!dx = r:til---*' {Jr+1*' 4J,Choose the correct answers for the following :

rj )i) If f = 3xy i- y' .1 , then I f .an from (0, 0) to 11, 2) along y: 2x2 is.at

U.

d.

6a.

D)+Fisaii) If V is the volumE_ obtained by a closed surface S and

differentiable vector function then llJ atv rOv =

A)0 B) Ili,na' c) [i ia, D) None of these

Greens theorem in the plane is Jvax + NdyC

iii)

ol gfll-4]-* B)n\rx ry )

iv) Stokes theorem i, ji.aiC

A) I(.u'ri)a. B)

..( av arv)jJl___ ldxdyR\ry ax)

b.

c.

J{oiui)o'c) Ir.u'rit.ra' D) None of these

Evaluate {i;a,

where i )ni+zy'i**r't *o , is the surface of the cylinder

x' + y' = 9 contained in the first octant between z : O and z: 2. (04 Marks)

Verify Greens theorem for, J{xv + y')dx + x'dy , where C is the closed curve made up of theC

line y: x and the parabolay: x2. (06 Marks)

Veri$rstoke'stheoremfori = (2x -y)i- yr' j-y'rifortheupperhalfofthesphere x2+y2+72:1.(06 Marks)

7 of 4

d.

.l rfa*4]*0, D)R\a* Ay )

,.(aN ana)Jll-+- HxdyR\ay Ax)

7a. Choose the correct answers for the following :

i) L{to"''}=A) 24lss

t) Gl'%

itPo'=A) nlz

A) e'/s + 1 B) e'/s - 1

\/l-A) 2t/rf"ln

ii) ,,JJ-I=ls'-2s+l7J

e1 z+t(s-z)' c) z+r(s+tl

- I t/

B) - Jnl s/'_ I 1/

C) ^lr I s7'

B) nl4 C) ,rl6

C) e-'/s - 1

10MAT21(04 Marks)

D) 2at(s + af

D GIJ; "'i1f,t

r-. .., ,, ,,

:::..i :1

D) dy"

' D) e-'/s + I

(04 Marks)

2a, then prove that

(06 Marks)

hence find the Laplace

(06 Marks)

(04 Marks)

D) e-'cos4t + sin4t

(04 Marks)

ii) '{+}=

iii)

b.

c.

Find the Laplace transform o1 1- cost .

t'Il rt,r={^t ^tt0<t<a is a periodic function of period

[2a-t fora<t<2at /as)

l{fttt}= .t"rtl7Js' \_,d. Express the following function in terms of the unit step function and

3/l-B) 4t/2l4Tc

1/ Ic) x/.f l"ln1/ I

o1 +t/, f zJ n

A) e'sos4i

r -.. '\

-,lSe''"1111) L'i--i=ls' + 9J

B) 1e'sin+t4

C) e'cos4t+le'sin4t4

A) H(t - n)sin3t B) H(t - n)cos3t c) H(t - n)cos9t D) - H(t - n)cos3tiv) The convolution of two functions (t) and g(t) is defined by f (t) *,g(t) =

A) je-"f(u)du0

-;,/Find the inverse Laplace transform of se '- + 7re -

.

s'+1r'

ttn) Jrlu;g(t-u)du C) Iftutett-u)du D) Je-',g(t-u)du000

b.

c.

d.

Using the convolution theorem, obtain the inverse Laplace transform of . I . . . (06 Marks)(s' + a';2

Using the Laplace transform method, solve the differential equation,

#. r# +2y =2t2 +2t+ 2 under the conditions y(0): 2, y'(0) = g.

*>F*d<*

4of4

(06 Marks)

USN L4CHELZI22

()o(J

o,

@

'oo:6)

?a)

d97 t')-*llcoo

.;I

.=N.d+xboY (.)

oq-d q)

oB

4d

bd(g()

otbotr(!d

}EG4

->B5iio.6-

}UqiE

E6)

6.Y>\ (Eboo6b0o=*otr>x r",- >ir"

\J{

*'6ioozlio

Time: 3 hrs.

fuel cell.

applications.

PART - B3 a. What is stress corrosion? Explain stress corrosion in boilers duereactions.

b. How does the following factor affect the rate of corrosion?i) Nature of corrosion product. ii) Temperature ii) pH.

First/Second Semester B.E. Degree Examination, June/July 2015

Engineering Chemistry

Note: Answer FIVE questions, selectingONE full questionfrom each part.

P-{RT -.{a.ExpIaintheconstructionandworkingofglasse1ectrode.b. Give the construction of calomel electrode. Justify that it is a reversible electrode. (05 Marks)c. Discuss the construction and working of Li - MnOz battery. (05 Marks)d. What are fuel cells? How is it different from galvanic cell? Mention any two advantages of

a. Define reference electrode. Explain the measurement of standard electrode potential usingCalomel electrocle. '1;r' (05 Marks)

b. A cell is obtained by combining two Cd electrqdh immersed in cadmium sulphate solutionsof 0.lM and 0.5M at 25'C. Give the cell rep'rds.bntation, cell reaction and calculate EMF ofthe cell. (05 Marks)

c. Describe the construction and working Of, din" -Air battery. (05 Marks)d. Explain the construction and working of methanol - oxygen fuel cell. Mention any two

Explain the folloWing factors influencing rate of electro - deposit.i) current denb.ity ii) metal ion concentration iii) throwing power.Explain the process of electroplating of chromium for engineering applications.**to* for not employing chromium as anode.

**$-hat is cathodic protection? Explain sacrificial anodic'''{hethod.

method and impressed current

' Explain the electro chemical theory of corrosion by taking iron as an example.Write a short note oni) polarisation ii) Decomposition potentialExplain the process of electroless plating of copper on PCB.

PART - COn burning 1.15g of a coal sample in a bomb calorimeter, the temperature of 3.5kg of waterin the calorimeter increased from26.5"C to 28.5'C. Water equivalent of calorimeter is 325g.Specific heat of water 4.187klkgf C'. Laterrt heat of steam = 581 Callg.If the fuel contains4Vo hydrogen, calculate gross and net calorific values.

Max. Marks:1[X]

(05 Marks)

(05 Marks)

to alkali with chemical(05 Marks)

(05 Marks)

(05 Marks)Indicate the

(05 Marks)

(05 Marks)(05 Marks)

(05 Marks)(05 Marks)

c.

d.

4a.

n. **lD.

.14\,' c.

*;1"*;frd.

5a.

't ^f ^

(05 Marks)

b.c.

d.

Explain synthesis of petrol by Fischer Tropseh process.Discuss the construction and working of a photovoltaic cell.Explain the production of solar grade silicon by Union - Carbide process.

a. Define octane number. Explain reformation of petrol with equations.b. What is biodiesel? How is it prepared? What are the advantages?c. What is doping? Explain doping of Si by diffusion Technique.d. Explain the designing of PV cells - Module, panel and Array.

i PART_EWhat is boiler feed water? Explain the priming and foaming in boilers.

(05 Marks)(05 Marks)(05 Ma{rs)

i:" -1.1b': :4(W\il4Ail$)

.{'ffi Marksluih" rus Marks)

;u\,,,*" (05 Marks)

14CHEL2t22

(05 Marks)

(05 Marks)(05 Marks)(05 Marks)(05 Marks)

PART _ Da. Explain the free radical mechanism of polymerisation taking vinylr€hl6ride as a monomer.

b.DifferentiateadditionandcondenSationpolymerisation.c. Give the synthesis reaction of Teflon and polycarbonate. . (04 Marks)d. Discuss the synthesis, properties and applications of epoxy iesin. (06 Marks)

a. Explain the following structure property relationships of polymers.i) Crystalinity ii) Elasticity iii) Pla3tic deformarion. (06 Marks)

b. Explain the following factors influencing the Tg.i) Flexibility ii) Branching and cross linking (04 Marks)

c. Explain the synthesis of carbon fibre. .,. "' (04 Marks)

d. What is conducting polymer? Expl@nh€ mechanism of conduction in polyaniline and givethe applications. ,;i.,- * (06 Marks)

,&"*'

9. a.

b.c.

d.

Define COD. Discuss the Experimental determination of COD of waste water. (05 Marks)What is nano nradhal? Discuss the synthesis of nano material by gas condensation andprecipitation qethtids. (05 Marks)Write r

i:113"*".arbon nano tubes. (05 Marks)

10 a. Explain'ttie activated sludge treatment of sewage water.b. Discuss the Desalination of sea water by reverse osmosis.c. Explain the synthesis of nanomaterials by hydro thermal process.d. Write a note on Dendrimers.

*****

2 of2

cfr:I?',l?i ! !i^ I

USN LOCIIELZI22

First/Second Semester B.E. Degree Examination, June/July 2015Engineering Chemistry

9)

A Time: 3 hrs. Max. Marks:i0O

... ,, i

E Note: l. Answer any FIVE full questions, choosing at least two from each part. {, k ,.

! 2. Answer all objective fitpe questions only on OMR sheet page 5 of the agsqcr booklet.E

fl 3. Answer to objective type questions on sheets other than OMR will not b,e valued.t "":g'8 na'7rr r .,,,,',',q= PART-A--t : 1 a. Choose the correct answers for the following I ,.*. (04 Marks)du -. - ,/'.

{ T i) A galvanic cell converts ,;

H + A) Electrical energy into chemical energy. ,''"....,0'**

E $ B) Chemical energy into electrical energyE ry C) Electrical energy into heat .n..gy

--"' D) , Gheriiical energy into heat energy.

oc

= g ii) Nemst equation is based on

c'I? E A) Thermodynamic principle - .B) An equation for redox potential8 g

^i t---,--- --'. - -, "l ^ . -t

.E 5 C) Increase in the free energy of the py,s@Z E D) None of the above.gct

; g iii) Potential of the concentration celt, Cy i Cr!; o*rr llau3;.r* I Cu at 250C ists \ .@6 ^ r

$E A) 0.02s9v B) 0.0atY c) 0.0se1v D) 0.0slev! E iv) Ag - AgCt electrode is %..-A 5 A) Primary reference elefitrode B) Secondary reference electrode

5 it C) Metal - metal ioq Sleetrode D) Membrane electrode

! : b. Define single electrode ial. Explain the origin of electrode potential. (04 Marks)

B E c. A cell is constructed.by,Euplng zini electrode dipped in 0.05M ZnSO+ and nickel electrode

E I dipped in 0.5M |i_S-pf. Write the cell representation, cell reaction and calculate EMF of the

{ I cell. Given t[at sfandard reduction potentials of zinc and nickel electrodes as -0.76V and

Z E -0.25Y resp_ffiely. (osMarks)

E H d. What is [ffiective electrode? Explain the determination of pH using glass electrode.6 f ,*a**

--------- -- r (07 Marks)>"'ii -uk"3

3oo "**pE * 2 a. Cffuli$e the correct answers for the following : (04 Marks)H 9 ii h which battery, a key component is separated from rest of the battery prior to=o: l r activationo < A) Primary battery B) Secondary battery: ' . i','l''-l C) Reserve battery D) None of thesec.l .

9_ h*;'', ii) Electrolyte used in the dry cell is

E \ - A) MnOz B) Graphite C) ZnCt"z + NH+C[ D) H2O

E iii) During recharge of lead-acid battery, the concentration of sulphuric acidag' A) Increases B) Decreases C) Becomes zero D) Remains constant

iv) Oxidation of methanol in methanol - oxygen fuel cell involves the loss ofA)1e B) 4es C) 2es D) 6es

b. Explain the following battery characteristics:i) Voltage ii) Capacity iii) Cycle life. (06 Marks)

c. Describe the construction and working of Nickel - Metalhydride battery. Mention its uses.(05 Marks)

t0cliBrzt22

d. What are fuel cells? Explain the construction and working of Hydrogen - Oxygen fuel cell.

A) Hydrogen B) Oxygen C) Nitrogen

(05 Marks)

(04 Marks)

D) Carbon dioxide ,

a. Choose the correct answers for the following :

i) In corrosion, the gas which is produced in acidic medium is

ii) Corrosion of steel boiler along the riverted portions is an example ofA) Differential aeration corrosion B) Differential metal corrosionC) Stress corrosion D) Grain boundary corrosion;"il:''

iii) Iron containers to store the food stuffs are coated with \, '" ;

A) zn B) At, C) Ni D) Sqiv) ln anodized aluminium, the corrosion protection is due to #A'

A) Passive oxide coating B) Phosphate coat!r4fu,.)C) Chromatecoating D) Noneof the*gi {'

b. Explain the following types of corrosion : ",'"f ,i) Differential aeration corrosion ii) Stress corrosiem.#

** (06 Marks)

c. Discuss the influence of following factors on the rate of eoifrSion.i) Nature of corrosion product ii) pH. {"ffi,

- (04 Marks)

d. What is Cathodic protection? Explain sacrificial anodi:method of corrosion control.

**#='a. Choose the correct answers for the followinffi-

i) Technological importance of metal,finishing is to impartA) Corrosion resistance *, 5,^/ B) SolderabilityC) Thermal resistance ,

*., " D) All of the aboveii) The function of complexing d$ntt in the electrolyte bath is to

(06 Marks)

(04 Marks)

(04 Marks)

A) Increase conductivity' " B) Increase metal ion concentrationC) Decrease metal fQr eoncentration D) None of these

iii) The anode used in electroplating of chromium isA) Chromium" B) Copper C) Pb - Sb D) Graphite

iv) The process,4ld€fftb manufacture a double sided printed circuit board isA) Elec-pr&ess plating B) Electro platingC) Imaftercion plating D) Phosphating

b. What is {-finishing? Explain the process of electroplating of gold. (06 Marks)c. Definetfie following terms :

i) DE nposition potential ii) Polarisation iii) Throwing power. (06 Marks)d. DiStinguish between electroplating and electroless plating. (04 Marks)

t,

I : PART. Ba. Choose the correct answers for the following :

i) Bomb calorimeter is used for the determination of calorific value of

ii) Which of the following possesses zero octane number?A) Iso octaneC) n - heptanes

iii) Catalysts used in catalytic converter areA) Ni, Co and Cr B) Pt, Pd and Rh

iv) Synthesis of biodiesel involvesA) Redox reactionC) Esterification

A) Solid fuelC) Both solid and liquid fuels

B) Liquid fuelD) Gaseous fuel

B) o - methyl naphthaleneD) Cyclohexane

C) SiO2 and A02O3 D) Zeolite

HydrolysisTrans esterification

B)D)

IOCrJELzI22

b. What is reforming of petroleum? Give any three reactions involved in reforming. (05 Marks)c. Define Gross calorific value and net calorific value. Calculate GCV and NCV from the

following data :

Mass of fuel sample = 0.87 x 10-3 kg ; Mass of water in the copper calorimeter = 2.35 kgWater equivalent of calorimeter = 0.45kg ; Increase in temperature of water = 2.80CSpecific heat of water = 4.l87klkgfC ; Latent heat of steam =2457 kJ/kgPercentage of hydrogen in fuel sample = 3.8. (06 Marks)

d. What is Photovoltaic cell? Explain the construction and working of PV cell. ;-"," ..' (05 Marks)

a. Choose the correct answers for the following ' ,. t';t

(04 Marks)i) The equation of condensed phase rule is ,,,,,,,..,."r,

"

A) F=C-P+2 B) F=C-P+3 C) F=C-P+1- D) Noneoftheseii) An invariant one component water system has .'"-'}l: *1

A) Two phases B) Three phases C) One phase D) No phaseiii) In potentiometer redox titrations, the calomel electrs&.ii used in combination with

A) Platinum electrode B) G,lAss €"iectrodeC) Ag/AgCt electrode D) Quinhydrone electrode

iv) Conductometric estimation is based on ,,,"t:,

A) Beer - Lambert's law " B) Nernst equationC) Henderson-Hesselbach equation ",*,. D) Ohm's law

b.c.

d.

State Gibb's phase rule. Draw and explain the phase diagram of water system. (07 Marks)State Beer's law and Lambert's law****-, (04 Marks)Drare tleer s law ano LamDen.s rarydqh# (O4Marks)Discuss the application of pote$gnwtry in the estimation of FAS using standard K2CI2O7solution. *^

*,. " (05 Marks)

(04 Marks)

(05 Marks)

Choose the correct answetrqffi#'the following : (04 Marks)i) Termination of pol in case of addition polymerization is by

A) Combinatiqnloftwo growing chainsbf growing chain with free radical of initiator

D) All of theseidely used in making inner tubes of tyre is

B) Butyl rubber

*H,il$tyrene - butadiene rubber D) Natural rubberiil).,,@trix used during the synthesis of polymer composite is

-,..",'"-.'t A; fhermosetting resin

,"" t*.;1 ' C) Benzene

B) FormaldehydeD) None of these

r"^,: iv) Which of the following is conducting polymer?A) Aniline B) Acetylene C) Polypyrole D) None

b. What is glass transition temperature? Explain the factors influencing Tg value. (05 Marks)c. Explain the manufacture of plastics by injection moulding process. (05 Marks)d. What are conducting polymers? Discuss the mechanism of oxidative doping of

polyacetylene. (06 Marks)

8 a. Choose the corect answers for the following :

i) COD of waste water is expressed inA) PPM of K2 Cr2O7C) mg of CaCOr

ii) Excessive fluoride in water leads toA) Dental carriers B) Silicosis

B) mg of oxygen per litreD) PPM of CaCO:

(04 Marks)

C) Fluorosis D) All of these

:l0cIIEtzt22

iii) The method used for secondary treatment of sewage isA) Activated sludge processC) Reverse Osmosis

B) Ion - exchange methodD) Electro - dialysis

b.

iv) Chloride content of water sample is determined by *, ''",,,,,,

A) Colorimetric method B) Argentometric methodC) SPADNS method D) Gravimetric method

What is Hard water? Explain the estimation of total hardness of water by EDTA,S"bJ}?$ . .

what is desalination? Explain desalination of water by reverse osmosis. -{]]::':''t [3:ffiH]

25CC of waste water was mixed with 25CC of KzCrzOT, acidifiefiffi refluxed. Theunreacted KzCrzOt requried 8.5CC of 0.25N FAS. In a blank titpafrBn'25CC of KzCrzOzacidified required 17.8CC of same FAS. Calculate COD of waste_wp6r. (04 Marks)

nffi

''l;.,x!:;,

,,la

c.

d.

{,"*a 3

,$

.rt,,, \,,

='''''r, ' *****

.

1a:

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--*!.,flp-'N &4-

&.\-'

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AnfA

USN IOCCPL3I23

First/Second Semester B.E. Degree Examination, June/July 2015Gomputer Goneepts and G Programming

.a "tt'!'"

Time: 3 hrs. Max. Marks:100Note: Answer any FIVE full questions,

selecting at least two from each part. -. e itr

. ..,, :: ,

PART-A ,,r,,,,.'*,ji

I a. i) Which of the following task is performed by a computer .,.,,,,""',,,

''""

A) processing B) input C) output ." u t,",., D) all of these

C,oC)

!p.

!J:!)

9Q()

d9

-^ll100

.= a.t(!+

otr-CO

8ea=

EU

aoa(qdEras-od.?o5lJ

ERi-

5i!a ..:

iD=aEi.!rd5.:>'!cAOoEo-u

9x9<-l',6i;=z

q

ii) The section within the CPU contains the stored prograrnA) secondary storage B) primary storage C)both A""r B

iii) A small uniiconsis-ting ofintegrat.d "ir.iitr

is sometiorls-talled as

D) neither A and B

D) gadget

D) ICs. (04 Marks)(06 Marks)(06 Marks)(04 Marks)

b. Describe the features of a computer.c. What are printers? Explain the types ofprinters.d. Explain the different types of microprocessors.

a. i) Categorize the CD - RoM ,r rt*;;;*ing memory deviceA) semiconductor memory B) memory registerC) magnetic memory D) none ofthese

ii) Two basic types of operating systems areA) sequential and d@bt* B) batch and interactive

A) processor B) chip C) circ@iv) What hardware was used by first generation conrgffirs?

A) vaccum tubes B) valves C) VLSI

C) batch and time sharingiii) Which of the follo*ing topology is not broadcast type

A) star ''",,,ti"' B) bus C) ringiv) Identify, fhe bfa term among the following group

D) sequential and real time.

D) tree

3

't' ,,, "

""'t

A) cgg4iai cable B) optical fibre C) twisted pair wire D) microwavesr{ } (04 Marks)

b. Whpt.,i bperating systems? Explain the different types of operating systems. (08 Marks)c. E#-----,0lain the need of networking and benefits ofnetworking. (08 Marks)

?., 'i) Which of the following is considered as a token in C languageA) keyword B) identifier C) operator D)allof the above

ii) The keyword among the following passes the program control out ofblockA) continue B) if C) break D) goto

iii) ln a C program, prior to using a variable, you must first _ itA) initialize B) declare C) define D)both A and B

iv) What will be the output ofthe following int a: b : c:3 ;print("%d oAd o/od", a, b, c)A)3 3 3 B) garbage value C)0 0 0 D)error.

(04 Marks)Write a flowchart to input three numbers and print largest of three numbers. (06 Marks)Write a structure of a C program. (05 Marks)What is a variable? How it is declared and initialized? Give example. (05 Marks)

1 of3

b.c.d.

t0ccPt3t23

4 a. i) Which of the following is a ternary operator,

A) >: B)<

5a.

c. Differentiate between while and do ---- while loop.2 of3

ii) When a function does not retum any value itar{_€{urn type isA) void B) null **p,'C; zero

iii) Identiff the error in the program segment

__ ir _;ir

d"u''df ar: d

ii) Which is the floating point constantA) '400.0' B) 0.0457

iii) What is the associativity of : : relational operatorA) left to right B) right to left C) no associativity D)none of the above

iv) Which statement is similar to a?b : c : d?A)( a?b:c): d B)(a?b):(c:d) C)a?(b:c: d) D)a?,(b:b):d.

*, ! ; (04Marks)What are operators? Explain the different types of operators. ,;,,,",r1r"

'" (10 Marks)Write a program to find the roots of a quadratic equation (06 Marks)

"',,t";:"i

"

PART-B ''-"''i"""""'''"'"'L 'i|

"

D Anay elements cannot be passed to a function usjpg. ''

A) call by value B) call by reference C) both A and B D) none ofthese

D) both A and B

c)?:

c)"0.0457"

D) &&

D)4s7

l!i

b.c.

function (int a, int b){inta;a:40 ;

retum (b) ;)

A) the function shqffibe defined as int function (int a, int b)B) variable is re&elaredC) both A aqq BD) neither ofA and B

iv) The geteh( ) and putchar( ) functions belongs to

. A),#&CI B) conio.h C) string.h D) ctype.h (04 Marks)b. write,d$ibgram using function to sort afi array of integers. (08 Marks)c. Wttttt,dre the parameter passing mechanism in C? Expiain in brief (08 Marks)

ri ':

ul''H) Which of the following 'C' statement braches unconditionally from one point to another

A) if B) goto C) switch D) if-elseii) When more than one if-else statements are used in a sequence. It is known as

A) if else ladder B) nested if else c) if else block D) nested elseiii) Which of the following executes one or more statements repeatedly unitl a condition is

met?A) if B) switch C) for D) continue

D) none oftheseiv) A loop with no test condition is

--A) while B) do ---- while C) for

b. Write a program using do ---- whils loop to display numbers 1 to 10, without ,r[T H#:](08 Marks)(08 Marks)

t$ccPt3l23

a. i) How many dimensions at array can have?A) one dimension B) two dimensionC) three dimension D) any no. of dimensions. ,,,,,

ii) How many elements can be added or removed from an anay at a time I

A)2 B)l c)4iii) What is the output of the following code,

int x[2] 12): {3,2,5,4};pittf("Yod", x[ 1 ] [ 1 ]) ;

A)3 B)4 c)siv) Elements of an array are stored in

A) Random memory locations

D) 6 n

iil,,";

, *u''t l

,,F-?

B) sequential memory locationsC) scattered memory locations D) direct mem,ary locations. (04 Marks)

b' Write a program to print the product of two dimensional arrays' (t0Marks)c. what is an array? Explain the types of an array with examplps" (06Marks)

"'a,

8 a. i) Open IVIP stands for ,ll:i.;

A) open multiprocessing B) open main parallelismC) open multitasking parallelism D) open multiprocessor

ii) The

-

function provides the number of processors, which is used to process aprogram.A) omp-get-num-procs( ) 1"" , B) omp-get-num-threads( )

C) omp-get-thread-num( ) ,;. ",i'-.0 D) omp-set-num-threads( )iii) Open MP is an API, which is based on

A) join model B) Fork * Join model C) Joint- fork model D)structural modeliv) The main components ofopen MP are directives, environmental variables and _

A) Runtime variables B) library functionsB) C)instances vmiAbles D) none. (04 Marks)

b. What is synchronirAtion in open MP? Explain the different synchronizationconstructs..:,.,i'",,i (08 Marks)c. Write a progrpm,,tb find the factorial of a number using open Mp. (08 Marks)

,.<t:t**

3 of3

USN

:

L4PCDL3I23

Time: 3 hrs.

4a.b.

c.

Note: Answer FIVE questions, selectingONE full questionfrom each part.

PART _ 1

ll) E={r(r-qI$-bX,-.) iii) C =.1*+v-tol

r,,.ll{l}",'-,,

*\'"

c.

Explain with examples formatted input output statements in C. (06 Marks)List four differences between while loop and do-while loop along with syntax and example.

(06 Marks)Design and develop a C program to reverse a given four digit integer number and checkwhether it is a palindrome or not. (08 Marks)

I of2

First/Second Semester B.E. Degree Examination, June/July 2015Programming in C and Data Structures

Max. Marks:tQO'

a. What are data types? Mention the different data types supported Ufftunguage, giving anexample to each. ,r.;,

,,, (05 Marks)b. Write a C program which takes as input p, t, r, compute the qimple interest and display the

result. . ?1, (0S Marks)

c. What is an operator? List and explain various types of op€rafdrs. (10 Marks),o ,i

a. What is a token? What are different types of tokens available in C language? Explain.,,:,,,1, i, : (08 Marks)

b. Write C expressions coffesponding to the following (Assume all quantities are of same type)

i) A=5x+3Ya+b

(06 Marks)

b=5;.-h'-*' b=5;x = b6.#-r x = (float) b/a ; (06 Marks)

.ds+- -{*'a

,t"

":*S* pARr - 2f*-tt-h'

hat are different types of conditional decision making statements? Explain each with:\ff-}; examples. (10 Marks)

1.1":' b. Write a C program to simulate simple calculator that performs arithmetic operations using

:", switch statement. Error message should be displayed, if any attempt is made to divide by(10 Marks)

-44 lq"

6a.

t4PCDL3t23

PART - 3

a. What is an array? Explain different methods of initialization of single dimensional arrays.(06 Marks)

b. Write a C program to read N integers into an array A and toi) find the sum of odd numbersii) find the sum of even numbersiii) find the average of all numbersOutput the results computed with appropriate headings.

c. How string is declared and initialized? Explain any FOUR string manipuh'tihh'iunctionswith examples. *j** (08 Marks)')

u{t"'eExplain function call, function definition and function prototype wiffib&mples to each.

tna nt

'l" ru''"'

'ilr'l'

fq,;t* ii

ffi Marks)

(06 Marks)ple. (06 Marks)

f a given number on' using(08 Marks)

(10 Marks)

(10 Marks)

number of(10 Marks)

b. What are actual parameters and formalc. What is recursion? Write a C program

recursion.

parameters? Illustrateto compute the

Define point variable. Explain with an example, the declarationVariable.

{<*{<**

:\

PAR+itl{t,,.**,liir(;

"

a. How structure is different from an array? Expfain declaration of a structure with an example.i#, * (06 Marks)

b. Explain with an example, how to cr-q4fa dstructure using 'typedef . (04 Marks)c. Write a C program to input the following details of 'N' students using structure :

Roll No : integer, Name : Stffig: Marks : float, Grade : charPrint the names of the studentswith marks 2.70.0Vo.

.- /,,ri[,,,

ii r:

.

8 a. Explain following filq@iations along with syntax and examples :

i) fopen( ) ii) rffir[) iii) fscanf( ) iv) fprint( ) v) fgets( ).b' Write a C prograrft {o read the contents from the file called abc.text, count thecharacters,,rffier of lines and number of white spaces and output the same.

1

".' 'ir;'J PART - 5t, , ,"',,,=''

9a.

..b.q'i,." -

,r 'u {

,,,;,#Y{} c'

10

Explain following C functions along with syntax and example to each :

i) malloc( ) ii) calloc( ) iii) realloc( ) iv) free( ).Develop a C program to read two numbers and function to swappointers.

Write short notes on following :

Preprocessor directivesPrimitive and non primitive data typesStack operationsTypes of queues.

and initialization of pointer(06 Marks)

(08 Marks)these numbers using

(06 Marks)

a.

b.c.

d. (20 Marks)

V"L"

ii) (10110101001.101011)2 = (?)16

v) (ABCD.EF)n = (?)a.

I of2

14ELN15/25

:::,',,::::

(05 Marks)

(07 Marks)neat circuit

(04 Marks)

(08 Marks)

iii) (988.86)10 = Q)z(05 Marks)

CC

USN

Basic Electronics

Time: 3 hrs. Max. Marksr{$., !

1". '*

Note: Answer any FIVE full questions, selecting ONE questionfrom eachpa*.

1a.b.

PART . ADraw and explain V - I characteristics of a Germanium Diode.

value.c. With neat diagram, explain the working of a

waveforms.d. Discuss in brief clipping circuit.

diagram and relevant waveforms.

circuit using i) Basic gates and ii) NAND gates.

6 a. Perform the following conversions :.

Find the value of the series resistance R, required to drive a forward current of 1.25mAthrough a Germanium diode from a 4.5V battery. Write the circuit diagram showing all the

'" i ' (O4Marks)

half wave rrectifier along with relevant"u, .,1

Explain the working of a positive clipper with

2 a. Explain the working of a full wave rectifier qsiiig 2 diodes with neat diagram. Also derivethe expressions for I6s and I.*, of a full wave rectifier. (10 Marks)

b. Discuss in brief clamping circuit. Explain working of a negative clamper. (04 Marks)c. Distinguish between Zener and Avalapche breakdown. (06 Marks)

., "i'j,r, '1,-. PART - B

3 a. Calculate the value of Is, IB ag4pd for a transistor with cra. = 0.98 and Is = 120pA..,,,,,,,iirr "4 (06 Marks)

b. For the base bias circuit;Q;s"= l8V, R. =2.2K{2, , RB = 470kO, hr. = 100 and Vse = 0.7V.Find Is, Is and Vce. QrqW'the DC load line and indicate the Q point. (08 Marks)

c. Discuss the ideal c.l,rfflidteristics of an operational amplifier. (06 Marks)

a. Explain the voltage follower circuit using operational amplifier. Mention its irnportantproperties: ,' ,.1 (05 Marks)

b. Design..-art adder circuit using Op amp to obtain an output voltage ofVs =.?[0.1Vr + 0.5V2+2Y3f, where Vr, Vz and V3 are input voltages. Draw the circuitdiAgam. (08 Marks)

c.,. ,Qbsign a voltage divider bias circuit to operate from a 12V supply with Vcs = 3V, Vs = 5V''-l*dnd Ic = lmA, VsE, = 0.7V. (07 Marks)

.ffitt pARr - c,,r,,,;*,iS a. With the help of a diode switching circuit and truth table explain the operation of an AND

"; ",'" gaie an,J OR gate. (05 Llarks)

b. State and p.or" Demorgan's theorem for three variables. (06 Marks)c. With truth table and logical expressions, give the design of a full adder circuit. Realize the

i) (1234.56)8 = (?)roiv) (532.65)ro = (?)ro

14ELN1s/2s

b. i) Subtract (1000.01)2 from (1011.10)2 using 1's and 2's complement method.ii) Add (1A8.67)rc with (15C.71)ro. (05 Marks)

c. Design a half adder circuit andrealize using Basic gates and NAND gates. (05 Marks)d. What are Universal gates? Realise AND and OR gate using Universal gates. (05 Marks)

PART. Da. Distinguish between a Latch and flipflop.b. Explain i) See beck effect ii) Peltier effect and iii) Thomson effect.c. Expiain the architeciure oi 8085 microprocessor, with neat diagram.

uffiparks)fd p5 Marks)

M,. ,,.'{ (10 Marks)

{'.p,,0,

a. Explain the working of a LVDT with neat diagram. .. 3,.,, ,' (06 Marks)

b. List the difference between a microprocessor and micro controller. ..,* (08 Marks)c. Explain the working of a R - S flipflop with relevant circuit and,trutA table. (06 Marks)

; ' li-"PART . E

a. What is Modulation? Mention some of the need for modulation in

b.c.

Give the comparison between AM and FM.

*****

1il;l]"::i'rd;"4

communication system.(06 Marks)(08 Marks)

(06 Marks)

With block diagram, explain the working of a coilglar mobile communication system.

,,.**-{1,,'""":' (06 Marks)_s" I10 a. Define Amplitude modulation and derive the expression for AM wave with relevant

waveforms. Draw the frequency spectium. (0g Marks)b. With neat diagram, explain the wprkiag of a telephone system. (06 Marks)c. An audio frequency signal 10 sin (2n x 500)t is used to amplitude modulate a carrier of

50 sin(2n x 105t). Calculatei) Modulation index. ,1i,lrrr"

ii) Sideband frequencies.iii) tsand wrdth.iv) Amplitude of ,@#sideband.v) Total powerf,&liVered to a load of 600fr.vi) Transmir p" efficiency.

...-,\,,,,

.lr

, . ,","lir

2 of2

^c' qtL

USN

Time: 3 hrs.

PART _ A

I a. Choose the correct answers for the following :

Regulated DC output ro$age Vo: 5 VMinimum zener current Iz,n6 : 5 rnAMaximum zener current I2ru*: 80 mA.

' Load current I.: 20 mA.

2 a. Choose,',the correct answers for the following :

A) 2 mV/"C B) 2.02mVloC C) I.8 nV/oC D) O.lpVi"Ciii) The DC output voltage of a bridge rectifier having a total secondary peak voltage of

100Vis_volts ..",.,iA) 63.6 V B) 31.8 v C) 90 V D) 70.7 Y

iv) Ideal value of voltage regulator for the power supply is _A) minimum B) maxirr$nd C) unit D) zero

b. With circuit and waveform, explq-{ thp working principle of a full wave bridge rectifier andderive an expression for average 'ind RMS value of current. (10 Marks)

c. Design a zener diode voltage to meet the following specification.Unregulated DC input voltage Vi: 10 V t 20 V

':'

?

First/Second Semester B.E. Degree Exarnination, June/July 2015Basic Electronlcs

1oELN15/25

(04 Marks)

(06 Marks)

(04 Marks)

"l.a....'

Max. Marks: tr00

()o

."o!,l o.(!

(.)

()!

()X

:ZidU

:vi-oo ll

c0a.S c.l<o+x ol)Y()so

?a

6-;

C)(J

o!c0i-o;Edr

:)6 .!J

sE-o.j

9Eai ')@E

!U=9>' lr-oootralo=

=9=o'a-

tr<:o=z

!

o.

Note: Answer any FIVE fall questions, ,"ilrl'*, ''

selecting at least ttuo from each parl.;a I

.1-

'. a:

::.,"

D The reverse saturation current of germanium diode at25"C isA) 100 nA B) 0.7A C) 0 3,A. D) lpA

ii) For every loC rise in temperature, the silicon diode forward voltage drop decreased by

i)', "{n a properly biased PNP transistor, some of the holes from the emitters': A) recombine with electron in the base B) recombine in the emitter it self; C) pass through the base to the collector D) are stopped by the junction barrierii) The current amplification factor cr4. is given by

A) IclIB B) IclIE c) Ie/Ieiii) The output resistance of transistor CB configuration is

D)IB/IC

D)100 oA)1KA B)0o c)MOiv) The following relationship between cr and B are correct EXCEPT

A)B:al l-u B)cr:gll-p C)o:B/1 +B D) i -cr:1/1 +0.With circuit and characteristic curve, explain the input and output characteristic curve oftransistor CE confi guration. (12 Marks)c' The reverse leakage current of the transistor when connected in CB configuration is 0.1 pA.While it is 16 prA when it is in CE configuration calculate croc and poc.

I of2

(04 Marks)

3a. Choose the correct answers for the following :

. t', ,'.,i.. 't ..

1OELN1i25'; '

(04 Marks)D The operating point is on the

A) output characteristic curve B) on the DC load lineC)transfercharacteristiccurveD)inputcharacteristiccurye

ii) The maximum peak to peak output voltage swing is obtained when the Q point of circuit.is locatedA) near saturation pointC) at the centre of the DC load line

iii) The more stable operating point for transistor is obtained from the biasing circuitA) fixed bias circuitC) collector to base bias

iv) In a transistor temperature sensitive parameter areA) Vcc and Ig B) Vrr and Ir C) Vcc and 16 D) Vsr and Iceo.

hFE(max) : 200. Assume Si transistor. (06 Marks)

(04 Marks)

B) near cutoff pointD) at least on the load line

B) voltage divider bias circuit l'",hr

D) reverse bias

,lt ,.,.

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ii) Band width of an amplifier is the range of frequency over which the gain is _A) gain is maximum B) gain is one C) gain is zero

iii) The electrical component of tank circuit areA)R,C B)R,L C)R,C,L

iv) For sustaining oscillations in an oscillator circuit '.j.,.

b. Write the circuit diagram for :i) voltage divider bias circuit ii) fixed bias circuit. (10 Marks).c. For the circuit shown in Fig. Q3(C). Find the range of operating pointr,when hpq6,; = 50,

Fig. Q3(c)

a. Choose the correct answers for the following : l.'11,

i) In an SCR, the function of the gate is to.,,., ' r', "

A) to control the SCR. current B) turn on the SCRC) turn OFF the SCR D) reduce the reverse break down voltage

ii) The unijunction transistor has 1

A) anode, cathode and gatq1,/\sl B) two base and one emitterc) two anode and one gate D) anode cathode and two gates

iii) A UJT used as aA) amplifier B) rehxation oscillator C) rectifier D) inverter

iv) A FET consists of ,#,A) source .; B) drain C) gate D) all of the above.

b. Sketch a 90o ph**dlcontrol circuit for an SCR and draw the load waveform. Explain theoperation oft"?-lp ijiicuit. (08 Marks)

c' Drawandexjl inthetypicaldrain characteristicofanN-channel JFET withVgs: 0. (08 Marko.':i T

PART-Ba. ChohSe tfre correct answers for the following : (04 Marks)

,)"""'fn an amplifier frequency response curve, the gain of the amplifier at half power point id

27ek Ltr,l

, , ,,, A) 0.707 of maximum value of gainC) 1.11 of maximum value of gain

A) feedback factor should be unityC) feedback should be negative

b. With a circuit diagram, explain the significance of each component of RC coupled amplifier.(06 Marks)'

c' With a circuit diagram, explain the operation of a Hartley oscillator. (06 Marks)d. In a colPitts oscillator, C1 = 100 pF and Cz : 60 pF. Find the value of L, if the frequency of

oscillation is 40 I(Hz. (04 Marks)

B) 1.41 of maximum value of gain :

D) 3.14 of maximum value of gain

D) gain constant

D)L,C ,l

B) phase shift should be 0oD) both A and B.

a. Choose the correct answers for the following :

i) Voltage gain of an voltage follower isA)0 B)* c)1

c) 10010i0r

c) s43

1OELN1/25(04 Marks)

D) los

(06 Marks)

(04 Marks)

(04 Marks)

D) (x + z)y

D)0

D)0

(04 Marks)

(06 Marks)

(06Marks)

ir) The meaning of infinite band width of an op-Amp is

A) it allows the signal with 50 Hz frequencyB) it allows all the frequency from 0 to oo HzC) it allows the signal with OHz frequencyD) it allows the signal with frequency mHz.

iii) The ideal characteristic of an op-Amp are . , " i i'

A) Ri : oo, Ro :0, Av: @, CMRR: oo 1',i,,1i';

C) R1 : 0, Ro : 0, Ar: 1, CMRR = co ,r.. ''",,.,,

D) &: €, Ro: 1, Ar:0, CMRR: co.

iv) In a non-inverting amplifier circuit, Rr:360 K, Rr : 120 K. The garn of the amplifier isA) 100 B) 1000 c:)4 "". .1., D)2.

b. Explain how an op-Amp can be used as a inverting summer. , t,:I*i (08 Marks)c. A 10 mV, 5 KHz sinusoidal signal is applied to input of an op-Amp integrator circuit for

which R: 100 K, C : 1 pF. Find the output voltage. ,f I","u (08 Marks)

a. Choose the correct answers for the following : ,l|il (04 Marks)i) A 400W carrier is modulated to a depth of 7 e/.o..The total power in a modulated wave is

A) 600 w B) 500 w ,,, ,.,..t) 499 w D) 0.5 Wii) The BCD equivalent decimal 14 is

A) 00101010 B) 00010100 D) 01000001

D) ACB

D) 0.10001(06 Marks)

iii) The 15's complement of (ABC!6:isA) CAB B) c_DA .

b.

c.

iv) The binary number of (0.56)itiisA) 0.01010 B) 0.10101 c) 1.011

Derive an expression for output power of an AM transmitter.Perform the following :

i) (ABC)ro + (ABCDE)ro : (?)ro

ir) Using 1's cor,-rplement (11010)2 - (10000)2 = (?)2.

d. Perform the following :

D (67s1.53fu + (?)ro

ii) (As1"3A)i6 : (?)2.

'.:a. ChEqSe it. correct answers for the following :

i) " The Boolean expression x+ y is equal toA)x+y+z B)(x+y)(x+z) C)(x+y)z

ii) The Boolean expression A + ag h equal to

A)B B)A c)1+Biii) In EX-OR gate, if the inputs are logically same then the output is

A)1

b. Simplify the Boolean expression :

y: AB + A(B + C) +B(B + C).

Implement Y = ABCD using, two input NOR gates.

Explain the operation of Fulladder and implement it using gates.

B)A C)Biv) The universal gates are

A) AND and OR B) NOT and NOR C) NAND and NOR D) EX-OR and EX-NOR.

c.

d.

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